1.air hose coupling/universal air hose coupling 2.size: 1/4"-1" 3.male/female adaptor, hose end without/with collar air hose coupling/universal couplingsize: 1/4", ... 3/8", 1/2", 3/4", 1"male adaptor, female adaptor, hose end without/with collarUS type ... 1"Universal EU female end: Size: 1/4", 3/8", 1/2", 3/4", 1" air hose coupling(European and U.S.Type)