The Craftsman E100251 Air Compressor Piston Kit contains components used in the compressor's piston mechanism. The piston moves within the cylinder to compress air, helping generate the pressure needed for the compressor's operation. As part of the compression assembly, these components support the movement and function of the air compression system. Replacing worn piston components w... https://www.wholetoolbox.com/craftsman-e100251-air-compressor-piston-kit/E100251.html