The"original" quiet compressor. Our JUN-AIR oil-lubricated compressorsare relied on worldwide, and many units are still in operation after 25 years -a testament to the quality and reliability of JUN-AIR compressors. Contrary to traditional compressors our JUN-AIR compressor, are not suppliedwith piston rings. Instead the tolerance between the piston and the cylinderhas been reduced, minimizing the heat development and the energy loss.