1.Global bow<= 3mm/m, local bow<=0.4mm/300mm iron 1.3.2mm 2.Solar prismatic glass ... . 3.Thickness: 3.2mm, 4mm. 4.ISO,CCC, SGC 3.2mm,4mm Low iron tempered solar glass Solar glass ... Float Glass 3mm, 3.2mm, 4mmTempered Regular patterned Glass 4mm FeaturesHigh light transmission, more than 91.6%Low optical defects ... PV ultra clear patterned glass, ultra clear rolled glass 4mm tempered solar cover glass