Primer Bulb for 1/2 inch ( 12mm ) Hose. / Color: Black / Material: Rubber, Metal / Dimension: 6'' x 1 3/4'' Frequently used as a hand pump in boats for fuel supply to the out-board engine Suitable for boats, RVs, tractors, and caravans. Exclusive check valves allow priming in multiple orientations without restricting fuel flow Compatible with Ethanol blended fuels Item Number : PDSA0151-12. The product is best used for export purposes. Please be advised that this product is not approved by the Environment Protection Agency (EPA). Pactrade Marine Rubber Fuel Pump Hand Large Primer Bulb Fuel Hose Boat Marine Car RV. Primer Bulb for 1/2 inch ( 12mm ) Hose. This Black Primer bulb made by rubber. The Dimension for this item is 6'' x 1 3/4''. In addition, providing more output while maintaining fuel flow that exceed all outboard manufacturers’ requirements. Frequently used as a hand pump in boats for fuel supply to the out-board engine. Compatible with Ethanol blended fuels. Item Number : PDSA0151-12. The product is best used for export purposes. Please be advised that this product is not approved by the Environment Protection Agency (EPA).