: ASTM B210 drawn, ASTM B241 extruded, AMS 4173, AMS 4080, AMS 4082, AMS4083, WW-T-7006 British Specifications : H20, HE 20 Applications : Bicycle Parts, aircraft ducting, wheelchair frames, telescopes, machined bushes, air cylinders Size Range : 18" - 16" (3mm - 406mm) OD; .020" - 2" (.5mm - 50mm) wall