Features:Material of stainless steel:grade: AISI 201, 202, 301,304, 304L, 316.etc. Specifications:1) Round pipes - Outside diameter(mm) :8, ... ,63,76,88.9,102,114,133,141,159,2192)Square pipes - Outside dimensions(mm) : 10x10,12x12,15x15,17x17,18x18,19x19, ... ,28x28,30x30,36x36,38x38,40x40,48x48,50x50,60x60,70x70,80x803)Rectangular pipes - Outside dimensions(mm) : 20x10,23x11,24x12,25x13,28x13,30x15, ...