Lock Type Air Hose Couplings IMPA CODE: 351011-14 1. The quick lock coupling feature makes it especially efficient and economical for every kind of air and pneumatic service. 2. Press the two fittings together, give a quarter turn to one, and the connection is made. 3. Made of cast brass, with hose ends on both sides. 4. Furnished in sets only. 5. Specification