3M Respirator Filter Retainer 501, 2EA Set Designed to hold 3M Particulate Filter 5N11 and 5P71/07194 (AAD) (sold separately) Component works with 3M Respirator 5000 Series, 3M Cartridges 6000 Series and 3M Filter Adapter 603 (In Box : 2EA) Approved 3M system component (In Box : 2EA) Color: Translucent white Package : 2EA