293 Pc. Back-Up Ring Kit
This 293 piece kit contains 36 of the most popular size “Parback®” Style Dished Cross Section back-up rings. Molded of 90A Durometer Buna-N rubber, they stretch for installation and return quickly to their original size. SIZES CORRESPOND TO O-RING NUMBERS. Your shop and service truck should not be without this handy kit.
36 sizes, 293 O-rings