Features 1、High quality materials for this cover, high temperature resistance and anti-fatigue 2、Not easy to wear during use, long service life. Emptive, low noise, convenient installation 3、With professional design and reasonable structure, the product is easy to replace and install 4、The valve plate is made of high‑strength material, safe and reliable. Safe to use 5、The valve plate possesses high workpiece accuracy, good performance and quality, which meets strict quality control standards Specification Item Type: Valve Plate Material: Aluminum Alloy Uses: Air Compressive Air Pump Accessories Drive Mode: Electric Applicable Model: 550W / 1100W / 1500W 550W: Outer Diameter Approx. 60 x 48mm / 2.3in x 1.9in [45 Degree Angle] 1100W: Outer Diameter Approx. 60 x 48mm / 2.3in x 1.9in[90 Degrees Right Angle] 1500W: Outer Diameter Approx. 66 x 56mm / 2.6 x 2.2in Package List 1 x Valve Plate