Description: This fuel primer bulb is ideal for vehicles without ESP-priming, using 1 or 2 tank systems,for the transfer of vegetable oil, Gas, petrol,it is most commonly used on outboard or inboard boat engines. With this hand pump you can prime the fuel for easier starts. Length:Approx.6.3 inch /16cm Width:Approx.1.8' inch /4.6cm Material:Aluminium Alloy and Rubber Diameter: 12mm Package Includes: 1 x Fuel Pump Primer Bulb