Portable Fuel Tank Cap with Tether - EPA CertifiedHigh-flow valve exceeds OEM engine fuel flow requirements. Be sure your fuel system is safe; the ratchet feature ensures a proper seal while the tether prevents cap loss. Very versatile; designed for 0 to 350 horsepower engines.Features: Standard 2 A 1/4 inch neck for convenience Includes high-flow automatic vacuum valve Tether Included Compatible with 8803LP/8806LP/8812LP/8812LLP Tanks Easy-to-grip cap features ratcheting noise so you know it&';s properly sealed Quick Guide (pdf)