Material: It is made of rubber aluminum alloy, resistance to crude oil, gasoline aging, not easy to crack, durable. Easy Installation: Step seals are easy to install hard to fall off, also can help prime the fuel system quickly. One-Way Valve Pump: Comes with a one-way valve installed to help quickly prime the fuel system. Excellent Design: Designed with low permeation material to prevent fuel evapation, to maintain flexibility prevent collapse in hot cold temperatures. Widely Used: Suitable f Cars, helicopters, ships, motcycles other fuel systems, perfect f carburets low pressure fuel systems. Size: 6MM 6mm and nbsp; h fuel pump line aluminum rubber h primer oil transfer bulb crude petroleum gasoline f marine outboard car boat Features: Material: It is made of rubber aluminum alloy, resistance to crude oil, gasoline aging, not easy to crack, durable. Easy Installation: Step seals are easy to install hard to fall off, also can help prime the fuel system quickly. One-Way Valve Pump: Comes with a one-way valve installed to help quickly prime the fuel system. Often used as a h pump in boats to supply fuel to the outboard mot. Excellent Design: Designed with low permeation material to prevent fuel evapation, to maintain flexibility prevent collapse in hot cold temperatures. Multiple application: suitable f Cars, helicopters, ships, motcycles other fuel systems, perfect f carburets low pressure fuel systems. Specification: Material: rubber and aluminum alloy Col: black Input connects: 6 mm,8mm,10mm,12mm and nbsp; Opening pressure: 0.2 bar Wking pressure range: 0.2-6 bar Operating temperature range: -30 - and 130 The package includes: 1 x h fuel pump