... blue, green, grey 4.Edge:Flat,grind,polished ItemTempered glass or Toughened glassThickness3mm, 3.5mm, 3.8mm, 4mm, ... So it has high level of heat resistanceType1. Flat tempered: Often used for the windows ,indoor, partition ... engineering, vehicle and other fields.Notes:1) Tempered glass can not be cut or grinding, and the ... is tempering.3) The stress of half tempered glass can not be to big to aviod the ...