Is your air compressor not building pressure like it used to? A worn valve plate might be the culprit. This set gives you 20 pieces of U-shaped valve plates, which are common replacement parts for many small piston-type air compressors. They're made from good quality, tough metal for durability and stable performance. Each plate measures 59mm (about 2.32 inches) in width, with a hole distance (center-to-center) of 46mm (about 1.81 inches). Always double-check these measurements against your old valve plate to ensure compatibility before ordering. Having a pack of 20 means you'll have plenty of spares for future repairs or for sharing with a friend. A straightforward, affordable fix to get your compressor running smoothly again. Please note: some mechanical knowledge is required for installation.