Sporty Frisco P Nut Peanut Wassell Style Motorcycle Custom Gas Tank MID Tunnel - Screw In Style Bung for Gas Cap - Steel - 1.8 Gallon - Harley Sportster Chopper Bobber Cafe Racer Fuel Cell Fabricated from 18 Gauge HRPO Steel with heavy duty 10 Gauge mounting tabs. Flush gas cap mount for 1982/later screw-in style gas caps (not included). Two 1/4 NPT petcock bungs on the rear of the tank (The perfect set-up for dual carburetors) 3/8" NPT Bung for Petcock on right hand side (Also available for purchase.) 1.8 Gallon capacity. 2" Wide Tunnel Also available with a "Low Tunnel" if you would prefer the tank to sit up higher...