The appearance is outstanding, integrating European industrial design concepts into the aesthetic elements of modern workshops, showing a strong noble attitude with a simple design language, and being born for the aesthetics of modern workshops; different internal structures, different temperament, from the external connotation. This 3-inch piston ring compressor adopts high-strength springs, heat-treated and equipped with ratchet belts, and its service life is twice that of ordinary people; professionalism is worthy of trust, allowing you to work with peace of mind. feature: Use high-strength spring steel High strength heat treatment Equipped with ratchet belt, stop and rotate Specification: Name: 3 inch piston ring compressor Expanded range: 53mm-150mm Piston ring height: 75mm Weight: 0.3kg