... ",1",1-1/4',1-1/2". 3,Material:Carbon Steel (Zinc Plat universal air Coupling We are Fuzhou Hongxing Machinery Co ... Thread End, Femaile Thread End5,Sizes Available:1/4", 3/8", 1/2", 3/4", 1" ,1 1/4",1 1/2 ... .8,Applications: For Air and Water Only.9,Warning: Never Use Universal Crowfoot Hose Couplings for steam service 10.customers 11, FAQ ...