Tata GI Plain sheet is used in the HVAC industry. These sheets are available in thickness of 0.45mm to 2mm. However, in the HVAC industry, 26 gauge 0.5mm, 24 gauge 0.6mm, 22 gauge 0.8mm, 20-gauge 1mm, 18 gauge 1.2mm, 16 gauge 1.6mm of GI sheets are most often used. The sheet length is typically 8 feet whereas the sheet width is either 3 feet or 4 feet. The zinc coating of 80 GSM or 120 GSM is also provided. GSM stands for Gram per Square Meter.