The 3M? Filter Retainer 502 is used to attach 3M? Particulate Filters 2000 Series and 7093 to the 3M? Respirators 5000 Series and 3M? Cartridges 6000 Series for a wide variety of applications.3M? Filter Retainer 502SKU: SPP02057S$4.55PriceQuantityADD TO CART