The quick connection with a spring INTERTOOL PT-1831 is used for mounting on spiral and straight air hose to provide quick connection to the pneumatic compressor or air line. They are also used to repair damaged hoses and replace the failed connectors. Features Spring perfectly protects the hose from the fracture and crease at the junction, without reducing its mobility. Hose is not breathable at the interface through a secure fit clamping nut. The complete absence of plastic parts. The brass core and casing matellichesky provide maximum operational time the connector. simple design makes it very easy and quick to install on quick connect hose. This connector provides a reliable and strong connection with pneumatic tools and is suitable for polyurethane, nylon and other hoses with an inner diameter of 6-7 mm and an outer diameter of 10 mm. Installation instructions on the hose 1. Put on a hose of the connector (with spring and clamping nut) so that the nut was closer to the edge. 2. Take a dip tube and its edge in hot water (at a temperature close to boiling) for a few seconds. 3. Put the heated region of the hose on the conical retainer disposed on the connector portion of the valve. 4. securely connect the first and second part of the connector presser nut.