... 1.ISO9001:2000 2.Size:1/4"-4" 3.Thread:BSPT,NPT or others 4.clear and no burr threaded ... Reducing coupling, Adjustable coupling, coupling with screw;Elbow -- equal elbow, reducing elbow, elbow with plain end, elbow with screw; Tee -- equal tee, reducing tee ... , tee with screwPipe cap,pipe bridge and ...