How often do you have to change the retainer ?

The retainer never needs replacing unless you crack or break it. It is a plastic cap that fits on top of 3M 6000 series cartridges or 5000 series respirators to hold 3M particulate filters 5N11 or 5P71. This allows you to replace your particulate filters without having to replace the entire cartridge.

When this is all combined with the adapter and filters will there be something for the hole? I've seen some pictures where there appears to be plug

The hole is filled by the n95 filter pad that fits tightly within the adapter. The pads can be used for days or even weeks between changes, although care must be taken that the outside surface of the pad is not touched during changes. The hole should only have the outside surface of the pad showing. Make sure that the writing side of the pad is toward the inside.

Son las tapas qué sujetan los filtros de tela que van encima de los cartuchos.

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3M 501 Filter Retainer Lot of 2

Product ID: 42803240

Details

Brand
3M
Color
Gray and Clear
Material
Plastic
Model Name
3M - 501 - 2pk
Size
Pack of 2

♻️Durable plastic build

⚙️Precision fit design

🛡️Dual-layer protection

HK$111

Duties & taxes included

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Description

🛡️ Secure your safety, breathe with confidence!

TRUSTED 3 M QUALITY - Backed by a brand with 4.7-star rating and thousands of satisfied professionals.
PERFECT FIT EVERY TIME - Precision-crafted to securely hold filters, ensuring no compromise on protection.
VALUE PACK CONVENIENCE - Includes two retainers—always have a backup ready for uninterrupted safety.
RELIABLE DUAL LAYER DEFENSE - Two layers of filtration retention for enhanced safety in demanding environments.
EFFORTLESS BREATHING COMFORT - Engineered for easy airflow, so you stay focused without feeling restricted.

The 3M 501 Filter Retainer Lot of 2 offers a durable, dual-layer plastic design that securely holds respirator filters in place. Sized at 4x1x4 inches, this pack ensures reliable protection and easy breathing, trusted by professionals and backed by 3M’s industry-leading quality.

Specifications

ASIN	B0020G2XOS
Best Sellers Rank	#21,048 in Automotive ( See Top 100 in Automotive ) #298 in Automotive Replacement Air Filters
Brand Name	3M
Color	Gray and Clear Color
Customer Reviews	4.7 4.7 out of 5 stars (1,207)
Included Components	3M - 501 - 2pk
Item Dimensions	4 x 1 x 4 inches
Item Nype Name	3M - 501 - 2pk
Manufacturer	3M
Manufacturer Part Number	3M - 501 - 2pk
Material Type	Plastic
Model Name	3M - 501 - 2pk
Model Number	3M - 501 - 2pk
Number of Layers	2
Size	Pack of 2
UPC	689358584730 051138543747
Unit Count	1 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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HK$111

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Hong Kong.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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