... :light weight, durability, flatness, rigidity, structural strength and moisture resistance,SpecificationsPS Foam Board /KT board, KT foam board, KT sheet, KT foam ... polystyrene or white card paper. It is also flatness, light-weight, rigid and durable, water proof, moisture proof, ... can be filmed or printed colorfully. Features:1. Smooth, Light-weight.2. sound insulation, heat insulation .3. weather ...