ASTM A269 (Polished) - available in sizes 1, 1 ½, 2, 2 ½, 3, 4. 316 Stainless Steel Hygienic Tube to ASTM A269 (Descaled) - available in sizes 1, 1 ½... ASTM A269 Compression Fittings to DIN2353 (Straight Coupling) Compression Fittings to DIN2353 (Male Stud Coupling) Compression Fittings to DIN2353 (E