1.stainless steel tube used for Doors, Windows Guards, ect. 2. High ... and bright polished, accurate measurement. 3.MOQ: 5MT. We specialize in manufacturing the stainless steel ... follow the ASTM A 554 standard.Features:1) Material of stainless steel: grade: 201, 202, 304, 304L, 316, 316L ... middle or according to customers' request Stainless steel Square tubes