Tough heavy duty steel canister capable of withstanding extreme pressureHeavy-duty steel casing features a welded hex nut for easier removal and installationHigh-performance tri-fiber media for optimum filtration and consistent oil flowPremium rubber relief valve for 100% sealCompatible with all oil typesSold each WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov This warning is being provided to comply with the State of California's Proposition 65.