Features 1、The main function of the piston ring is to sealing the combustion chamber and the piston housing and transfer heat from the piston to the cylinder. 2、Our piston rings can provide better sealing, improve performance and reduce fuel consumption. 3、This piston ring is made of high quality titanium alloy material, which effectively resists oxidation, 4、Our replacement engine piston rings are rust proof, durable and have a long service life. 5、The diameter of the piston ring is 48mm(1.9in), which is suitable for carpentry, replacement parts for air pumps and small air compressors. Specification Item Type: Piston Ring Commodity Material: Titanium Alloy Suitable Piston Diameter: Approx. 48mm/1.9in Purpose: 1P2.2P,3P,4P,5P,6P woodworking, air pump, small air compressor, Bama, wind power, V type machine, etc. Package List 3 x Piston Ring