... +/-10% of wall thickness c) Length: +/-4.5mm Standard:Strictly follow the ASTM A 554 and others. ... balcony balustrades,furniture, sanitary wares, kitchen wares)Specifications:1) Round pipes - Outside diameter(mm) :8,9.5,11 ... 35,36,38,45, 47,48,50.8,60,63,76,88.9,102,114,133,141,159 ... ) Thickness: ±10% of wall thicknessc) Length: ±4.5mm - 0mm8) Other size can be manufactured according to requirements ...