Back Up Rings

Back Up Rings

STYLE KBI01-A BUNA-N BACK-UP RINGS Molded of 90A Durometer Buna-N Rubber, these "Parback®" Style Dished Cross Section back-up rings provide excellent extrusion resistance. Stretched for installation, they return quickly to their original size for easy installation. NOTE: Sizes (Dash No.) corresponds to standard o-ring numbers.

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