Feature: 1. High quality replacement piston, suitable for piston air compressors and air pump pistons. 2. The whole machine has simple and compact structure, light weight and flexible movement. 3. Durable, anti‑corrosion, anti‑impact, anti‑oxidation, high temperature resistance, wear resistance. 4. Adopting die‑casting process, streamlined design, beautiful appearance, and excellent heat dissipation. 5. After heat treatment and surface hardening, it has excellent comprehensive mechanical properties. Specification: Item Type: Air Compressor Piston Material: Aluminum Length: Approx.35mm / 1.38in Diameter: Approx.48mm / 1.89in Hole Diameter: Approx.12mm / 0.47in Application: Piston type air compressor, air pump piston Package List: 1 x Air Compressor Piston