stainless steel pipe use for stair railing,windows guards,Door Thickness:0.3~3.0mm ... nature, To the excellence. NameStainless Steel Railing StandardASTM A312, A249,A269 and A270,A554Material Grade201,202,304,316,316L, ... , 320G Satin / Hairline400G, 600G Mirror finishApplicationhandrail,railing, staircase, weldmesh screen,door,window, balcony,fence,bench,furniture,etcTestSquash test, extended test, ...