• Front view of AMS A420D Professional Reusable Respirator Mask compatible with A4501 replacement filters
  • Step-by-step guide on how to replace and insert A4501 filter into AMS A420D mask retainer
  • Worker using angle grinder with sparks flying while wearing AMS A420D respirator with A4501 filter for industrial protection
  • Recommended industrial applications for AMS A4501 filters including metalworking shop, chemical plant, welding area, and woodworking
  • User guide instructions for AMS A420D respirator: installing filter, adjusting straps, and performing negative pressure seal check

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AMS A4501 Replacement Particulate Filters for A420D Respirator

AMS A4501 Replacement Particulate Filters for A420D Respirator

 (1698 Reviews)
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$15.00
$15.00
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Official AMS Replacement Part | Compatible with A420D Only

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AMS A4501 Replacement Particulate Filters for A420D Respirator

AMS A4501 Replacement Particulate Filters for A420D Respirator

$15.00
   
AMS A420D Silicone Half Face Respirator Kit with 10 Filters for Woodworking, Sanding & Sawing Dust

AMS A420D Silicone Half Face Respirator Kit with 10 Filters for Woodworking, Sanding & Sawing Dust

$37.00 $24.99
Total:

FREE SHIPPING INCLUDED

$52.00 $39.99

 
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AMS A4501 Replacement Particulate Filters for A420D Respirator

AMS A4501 Replacement Particulate Filters for A420D Respirator

$15.00
$15.00
SAVE Sold out

Dense airborne sawdust and harsh industrial particulates slow down your workflow and compromise on-site safety. The AMS A4501 Replacement Filters provide a robust, professional-grade barrier, ensuring you stay protected and comfortable during the most demanding projects.

Core Benefits

  • 5-Ply Defense Shield: Dual melt-blown layers block 95 percent of fine debris, ensuring you breathe easily in heavy-duty carpentry and automotive environments.
  • Hot Air Cotton Technology: Maintains ultra-low breathing resistance under 210 Pa, preventing work fatigue even during long industrial shifts.
  • Perfect Airtight Seal: Custom-engineered for the A420D retainer, completely eliminating the air leaks commonly found in generic replacement filters.
  • Economic & Eco-Friendly: Replace only the internal cotton pad instead of the entire plastic cartridge, cutting your operational costs by 40 percent and reducing waste.

Important Compatibility Notice

Designed strictly with a custom-fit pad exclusively for the AMS A420D respirator. It does not fit other AMS models (A620, A680, A820). Furthermore, its precise dimensions make it completely incompatible with 3M series, 3M 501 retainers, Honeywell, North, and GVS systems. Upgrade your A420D setup today with true 5-ply protection.

What is Included

  • 10 x AMS A4501 Replacement Particulate Filter Pads (Standard 10-Pack)
  • Note: The AMS A420D respirator mask and plastic filter retainers are sold separately.
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How long does shipping take?

For U.S residents, shipping takes 4-13 days. For international orders, it takes 10-20 days. We provide tracking for all orders. You can also visit our Track Your Order page for the latest updates.

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What is the return policy & fit guarantee?

We stand behind our gear. If the mask doesn't fit perfectly or meet your expectations, you can return it within 30 days in unused condition for a full refund or exchange. We also offer a 1-year warranty against manufacturing defects

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Need technical help or filter advice?

Not sure which filter is right for your chemicals? Our safety specialists are ready to assist. Contact us via the chat widget or email support@amsarmor.com. We respond to all technical inquiries within 24 hours.

  • ⭐⭐⭐⭐⭐ Fits the A420D perfectly
    "Was worried about the fit, but these snap right into my AMS A420D mask securely. The seal is tight, and I feel much safer using these than the generic pads I bought before."

    — Tom H. (Verified Buyer)

  • ⭐⭐⭐⭐⭐ Great airflow, doesn't clog
    "I use these for heavy sanding and woodworking. The 5-layer design is thick but surprisingly easy to breathe through. They hold a lot of sawdust before needing a change."

    — Robert M. (Woodworker)

  • ⭐⭐⭐⭐⭐ Unbeatable value
    "The 10-pack is a steal. Much cheaper than burning through disposable masks every day. Quality is top-notch and the individual packaging keeps them clean until use."

    — D. Wilson (Verified Buyer)
    View full details

    Designed Exclusively for the AMS A420D System

    Don't compromise your seal with generic filters. The A4501 fits perfectly into the A420D’s retainer, ensuring a 100% airtight seal for negative pressure checks.

    Why Choose AMS A4501?

    • AMS A420D Respirator Kit Exploded View showing Cold Flow Exhalation Valve and Filter Assembly

      Advanced Airflow Technology

      Unlike standard 3-layer filters, our unique Hot Air Cotton layer creates a 3D depth filter. It traps dust without clogging the surface, keeping breathing resistance low (<210 Pa) even during heavy labor.

    • 5-Ply Filter Structure Diagram of AMS A4501 featuring Dual Melt-blown and Hot Air Cotton layers for maximum dust holding

      The 5-Ply Defense Shield

      We use Dual Melt-blown layers. Layer 2 captures coarse particles, while the electrostatically charged Layer 4 traps sub-micron particles (<0.3 microns), ensuring consistent ≥95% efficiency.

    • Step-by-step guide on how to replace and insert A4501 filter into AMS A420D mask retainer

      Smart Protection

      Stop throwing away expensive disposable masks. Simply replace the A4501 cotton filter and keep your durable A420D silicone mask. Save money while reducing waste.
      5-Ply Filter Structure Diagram of AMS A4501 featuring Dual Melt-blown and Hot Air Cotton layers for maximum dust holding

      Inside the Protection: 5 Layers of Defense

      Outer Non-woven: Blocks large debris and sparks.

      Melt-blown Layer 1: Initial fine dust filtration.

      Hot Air Cotton: The "Game Changer." Adds thickness for dust capacity and thermal insulation against moisture.

      Electrostatic Melt-blown Layer 2: Traps microscopic particles via electrostatic attraction.

      Soft Inner Layer: Skin-friendly fabric for all-day comfort.

      User guide instructions for AMS A420D respirator: installing filter, adjusting straps, and performing negative pressure seal check

      Designed for AMS A420D Series

      This filter is the "lung" of your AMS A420D respirator system.

      Perfect Fit: Sits securely inside the filter box cover.

      Correct Installation: Ensure the printed text side faces inward (towards your face) and the plain white side faces outward.

      Compatibility: Works with AMS models A420D.

      Why AMS is the Smart Choice

      Stop overpaying for replacement filters. Get a complete month's supply in one box.

        Others
      10 Filters (1-Month Supply)
      Food-Grade Silicone
      Hypoallergenic (No Rash)
      Cold-Flow Valve System

      Verified Customer Reviews

      Excellent 4.8 / 5

      • Game changer for sanding dust!

        "I spend hours sanding custom cabinets and usually, standard filters clog up within 30 minutes, making it hard to breathe. These A4501 filters are much thicker and hold way more dust without choking off the airflow. I can work for half a day before needing a change. They fit my A420D mask perfectly and the seal is 100%."

        — James R. – Custom Furniture Maker

      • Best value for daily grinding

        "I used to burn through expensive disposable N95s every day at the shop. Switching to the A420D mask with these A4501 replacement pads has saved me a ton of money. The 10-pack lasts me weeks. They block out all the metallic dust and sparks from my angle grinder, and I don't have that black soot in my nose at the end of the shift."

        — Mike D. – Metal Fabricator

      • Perfect seal against drywall dust

        "Drywall dust finds its way through everything, but not these. The 5-layer design really stops the fine white powder. The inner layer is soft on the skin and doesn't get fuzzy like cheap pads. Combined with the silicone mask, my glasses don't fog up anymore. Highly recommend for any renovation work."

        — Sarah L. – Home Renovator

        Technical Specifications

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        Product Specs

        Model: AMS A4501

        Standard: GB2626-2019 KN95.

        Filtration Efficiency: ≥ 95% (NaCl medium).

        Material: Non-woven PP, Melt-blown fabric, Hot Air Cotton.

        Shelf Life: 3 Years (in original sealed packaging)

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        Maintenance & Safety

        Do Not Wash: Water destroys the electrostatic charge, reducing efficiency to ~60%.

        When to Change: Replace when breathing becomes difficult, the filter is damaged, or you detect odors.

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        Recommended Applications

        Woodworking: Sawdust, sanding dust.

        Metalworking: Grinding, cutting, welding fumes (ozone-free).

        Construction: Cement dust, drywall, silica dust.

        General Industry: Factory dust, non-oil based aerosols.