Pneumatic union, pneumatic union, fittings, intermediate joint, quick joint, union joint, swivel elbow, tee joint, air union, air jack, Legris fittings and other types of pneumatic unions. Pneumatic unions are used as connection equipment in air-operated systems. Pneumatic unions can be connected from a hose to a hose as well as from a pass to a hose. Air unions, which are generally divided into two as jaw and squeeze type, vary according to the conditions of use, materials, dimensions, pass standards and the materials from which they are manufactured.