... 3,Material:Carbon Steel (Zinc Plat universal air Coupling We are Fuzhou Hongxing Machinery Co., Ltd. in ... (cam & groove quick couplings), guillemin coupling, Bauer type coupling, chicago coupling, Ground joint coupling, sandblast coupling, King combination nipple, DIN2817 safety clamp ... all with holes for safety locking pins.1,Universal Crowfoot Air Hose Coupling Type Available:EuropeanType,US Type2, ...