High flow one-way check valves designed to prevent back-flow with minimal pressure drop. Ideal for use where it is desirable to prevent drain back after the fuel pump is turned off, or when dual pumps are employed and both pumps will not always be running together. * CNC-machined of 6061-T651 billet aluminum alloy. * Available in -6 AN and -10 AN sizes. * AN O-ring male inlet/female outlet connections allow easy installation into fuel pump outlet port without adding additional lines, hose-ends or fittings. * Type II bright dip black anodized finish. Note: The Aeromotive check valve is NEVER to be used as a fuel tank "rollover-vent valve" or located on the inlet side of any fuel pump. PartNumber : aer15631 Description : Billet Fuel Sample Valve Title : Billet Fuel Sample Valve 17 : Black 3390 : Performance 10 : Billet 3145 : Universal Color : Black Grade Type : Performance Material : Billet Universal Or Specific Fit : Universal California Proposition 65 : WARNING: This product can expose you to chemicals including chromium, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.p65warnings.ca.gov. Engine Components::Valves