... stainless steel material Brass forged tube fittings, equal elbow, 90 degree, A-8603 model, female thread, BSPP thread, ... and gas supply system Model options: 45 degree, 90 degree, equal elbow, reducing elbow, threaded elbow, welding elbow.Material optional: brass (HPb57-3A, ... HDGConnection type: thread (BSP, NPT), weldingStandard: ISO, GB or ASTM, ANSICertification: ISO 9001:2000, CE, ACS, TUV, UL, ...