This flameproof sheet is certified by the Japan Fire Retardant Association and can be used for a wide range of applications, such as for curing construction sites, and for covering wild blocks. This size is for wild and curing. When using for scaffolding, please use 1.8 x 3.6 and 1.8 x 5.4. Due to the nature of the sheet material, there may be a difference of ±2% due to shrinkage depending on the season.