For all air inlet nipples Outside thread 12.91 mm / 1/4″ Safe disconnection of the connection (unwanted disconnection is excluded) No risk of injury from hose impact Safety coupling depressurizes the connection before decoupling Working range: 0 – 20 bar One-hand operation Little effort during coupling and decoupling Omission of loud popping during coupling process Easy operation, even with gloves Brass, nickel-plated Air connection outlet: Coupler bushing for type 1, 2, 3, 4 Surface: nickel-plated Net weight: 0.13 kg Temperature range: -15°C – 80°C.