This 3M™ 501 filter retainer is used to hold 3M™ 5925 & 5935 filters in place on 3M™ 6000 and 7000 Series gas and vapour cartridges. * Supplied as 1 pair * 4 x 8.5 x 4.5in (H x L x W) * Approved to AS/NZS1716 * Manufacturer's part 501 https://elecena.pl/product/27309377/3m-501-reusable-respirator-filter-retainer-1-pair 2024-11-20 https://elecena.pl/product/27309377/3m-501-reusable-respirator-filter-retainer-1-pair 2026-07-18