Item Type: Air Compressor Gasket Model: Cylinder 51 aluminum gasket Function: Sealing function Maximum Outer Diameter: Approx. 79mm / 3.1in Material: Aluminum Note: Cylinder 51 means that the diameter of the cylinder is 51mm Package List 10 x Air Compressor Gasket When using, pay attention to installation on the cylinder with a diameter of 51mm. 1These gaskets come with standard production, suitable for cylinders with a diameter of 51mm 2Gasket is made of aluminum material, with good sealing effect and long service life 3Sturdy and durable, which is the most worth to buy product among gaskets 4This air compressor gasket come with excellent thermal conductivity, ductility and corrosion resistance 5Air pump gasket with stable structure, excellent performance and long service life