Quality Material: Lightweight alloy and rubber, NBR rubber and aluminum alloy, made of rubber and corrosion-resistant metal, oil-proof, durable, wear-resistant, not easy to tear, and has a long service life. Excellent design : Thickened design with double sealing clips for better tightness. A large bulb shape provides high suction power and speeds up oil pumping. Equipped with low permeation material to prevent fuel evaporation, maintain flexibility and prevent collapse in hot and cold temperatures, and will not fall off. Wide Application: Suitable for helicopters, ships, motorcycles and other fuel systems, suitable for carburetor and low-pressure fuel systems. Metal Valves Size: 8mm (5/16") Body Size: 154 x 46mm. Package Includes: 1 X Rubber Fuel Primer Petrol Petrol Diesel Pump Black (8mm). Product s Universal fittings for boats, tractors and other cars. Specifications: Color: Black. Material: Alloy and rubber.