About this product: High quality materials: The pump ball is made of high quality rubber and corrosion resistant metal. The large ball-shaped structure provides strong suction, is not easy to tear, and offers long-lasting performance. Quick emptying or filling: The check valve design ensures liquid flow when pressed after connecting and placing on the pipe. The container should be positioned at a low height for quick emptying or refilling. For a variety of liquids: Pressure pumps are suitable for fuel, motor oil, gasoline, diesel, and gear oils. Not suitable for corrosive liquids or potable water. Simple and effective tool: The fuel pump is compatible with most engines, commonly used for outboard or inboard marine engines. Ideal for priming the fuel system after replacing the fuel filter. What You Get: 2 pcs x Fuel Line Pump. If you have any questions about the products, you can for customer support. Size: 6mm Specification: Material: Aluminum Alloy and Rubber Color: Black Outer Diameter: 6 mm / 0.3 inch Length: approx. 15 cm / 5.9 inch Diameter of the sphere: 4.5 cm / 1.8 inch Weight (per piece): 78 g / 2.8 oz