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

574 Kit