This Tee Bars are made of GI. and coli-coated steel, T24mm ... , strong, tight enough after being installated, perfect.Main Tee: 38x24x3000mm, 38x24x3600mm, 32x24x3000mm, 32x24x3600mm.Cross Tee: 32x24x600mm, 32x24x1200mm, 26x24x600mm, 26x24x1200mm.Thickness: 0.3mm ... , 0.35mm, 0.4mm.Packing: Main Tee 25pcs/ctn. Cross Tee 75pcs/ctn, or 50pcs/ctn. Tee Bar