Covering 3R and 4R series, providing adaptability to pneumatic systems with different pipe diameters. Adopting a manual lever direct action structure, the operation feels clear and the positioning is accurate and reliable. The interior adopts a sliding column valve core structure, with good sealing performance, small volume, light weight, and easy disassembly and assembly. No need to add lubricating oil under normal working conditions, simplifying daily maintenance work. The aluminum alloy valve body is sturdy and durable., Manufacturer: wenwendianzi