【Warranty】18 months. (100% Brand New High Quality Aftermarket Pump Primer Bulb) | 【Product Size】8mm(Diameter) 5/16 (Length:About 16 cm/6.3" ; Width:About 5cm/2") | 【100% Qualified Materials】High quality ,Light wieght aluminum alloy material and rubber for extended service life | 【Application】8mm fuel primer pump petrol often used for outboard or inboard engines. And for fuel supply to the out-board 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.