4" Cam & Groove Camlock Gasket, Food Grade,5 NBR,5 EPDM,5 Viton (15 gaskets)

Outside Diameter (OD): 4-7/8" Inside Diameter (ID): 4" Thickness: 1/4" (.250")You may also like 044 Silicone O-ring 70A Durometer Red, Sterling Seal and Supply (1000 Pack).