5/16 inch 8mm Rubber Fuel Transfer Vacuum Fuel Line Hand Primer Bulb for Description: Length (overall): 147mm/ 5.79 inch Length (without hose connections): 115 mm Connector: 8MM /5/16" Material: rubber and aluminum Color: Black Engine Type : Gas, petrol Frequently used as a hand pump in boats for fuel supply to the out-board engine Size Chart: Inner diameter: 5.6mm/ 0.22inch Package Includes: 1 Piece Bulb hand pump Note: This fuel primer bulb is ideal for vehicles without ESP-priming, using 1 or 2 tank systems, as well as for the transfer of vegetable oil, , it is most commonly used on outboard or inboard boat engines. With this hand pump you can the fuel for easier starts. The pump is temperature resistant up to -30----130 C. THANK YOU for SHOPPING WITH US! Have a nice day _x000D_