https://www.5startools.com/tools-1/respirator-3m-07193-dual-cartridge-respirator -assembly-organic-vapor-large 1 NEW 3M 07193 Dual Cartridge Respirator Assembly Organic Vapor / P95 LARGE The 07193 and 07192 respirators are designed to be maintenance free. Once the cartridges are spent, simply replace the whole unit. Includes a zip style bag for storage when not in use.' Tel : 773-225-5979 KEN