These fuel line kits are temperature, gas and oil resistant. They are made from reinforced synthetic Chlorinated Polyethylene rubber hose with a nylon inner braid for strength. They feature a 3/8" NPT inlet fitting and a 1/8" pipe fitting with plug for a fuel pressure gauge. Fuel Line kit #8101 is adjustable between the carb bowls from 7-1/2" to 11-1/2". Hose nipple not included.