10mm 3/8" Black Bulb Type Rubber Fuel Transfer Vacuum Fuel Line Hand Primer Gasoline Petrol Diesel Pump Bulb for Marine Boat AccessoriesSize: 3/8"About this item 【Product Size】7.09 x 3.27 x 2.05 inches 【100% Qualified Materials】High quality, lightweight aluminum alloy material and rubber for extended service life 【Application】Often used for outboard or inboard engines and for fuel supply to the outboard engine. 【Features】Suitable for vehicles without ESP start-up, using 1 or 2 tank systems to transport vegetable oil, natural gas, and gasoline, with a one-way valve installed to help quickly prime the fuel system. Dimensions: 7.09 x 3.27 x 2.05 inches