Back Up O-Rings are implemented when your primary seal is subject to high temperatures or pressures, or if an excessive extrusion gap is presented in the application. They serve to provide extra strength to the seal and prevent your primary seal from being damaged. Whenever possible two back-up rings should be placed, one on each side of the primary seal.

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N/A Prop 65 Warning: This product may contain chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm.

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