Features： *High quality replacement piston, suitable for piston air compressors and air pump pistons. *The whole machine has simple and compact structure, light weight and flexible movement. *, anti‑corrosion, anti‑, anti‑oxidation, high temperature resistance, wear resistance. *The function of the piston ring is to maintain the air tightness between the piston and the cylinder wall. *With standard inner and outer diameter size, it is convenient to install and disassemble. *The has no casting defects such as cracks, pores, looseness, etc., tight connection. *The kit contains 1 piston + 3 replacement piston rings + 1 Pin + 2 Circlip, which can replace the old or damaged ones on the air pump at any time. Specifications： *Product name: Air Compressor Piston + Piston Ring *Material: Metal *Color: Silver, Black *Size: (Optional ) 42mm, 47mm, 48mm, 51mm, 65mm, 70mm, 80mm, 90mm *Suitable for: Piston type air compressor, air pump piston *Quantity: 7pcs/set Package Content： 1*Air Compressor Piston 3*Air Compressor Piston Rings 1*Pin 2*Circlip Note： 1.Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data. 【Replacement Piston for Air Compressors】- Designed as a replacement piston for air compressors and air pump pistons, optimal performance and functionality. 【Simple and Compact Design】- The whole machine features a simple and compact structure, providing a lightweight and flexible movement for easy handling and operation. 【 for durable and Material】- Made from for durable materials, the piston exhibits excellent anti-corrosion, anti-impact,, and wear resistance properties. It can withstand high temperatures and maintain its performance in demanding conditions. 【Efficient Air Tightness】- The piston rings play a crucial role in maintaining a tight seal between the piston and the cylinder wall, efficient air tightness for reliable operation. 【Easy Installation and Disassembly】- The piston comes with standard inner and outer diameter sizes, allowing for convenient installation and disassembly. Its well-formed for surface ensures a tight and secure connection without any casting defects.