Quality Material: Light weight alloy and rubber, high quality rubber and aluminum alloy, made of high quality rubber and corrosion resistant metal, oil resistant, durable, wear resistant, not easy to tear and long service life. Excellent Design: Thickened design with double sealing fasteners for better sealing. Large glowing shape ensures strong suction power and speeds up oil pumping.Ingest with low permeation material to prevent fuel evaporation, maintain flexibility and avoid collapse in hot and cold weather. The connector is designed to facilitate the installation of the casing tube 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 / 6.06 x 1.81in Package includes: 2 x Rubber Fuel Petrol Petrol Diesel Black Pump (8mm)