... , steel, iron and stainless steel material Brass forged tube fittings, equal elbow, 90 degree, A-8603 model, female thread, BSPP thread, ISO228 ... gas supply system Model options: 45 degree, 90 degree, equal elbow, reducing elbow, threaded elbow, welding elbow.Material optional: brass (HPb57-3A, HPb58-3A, HPb59 ...