... ,Environmental protectio PP hollow board/pp corrugated sheet/Pp plastic sheet/PP PLASTIC SHEETSpecificaton(in millimeters):PP hollow sheet is made ... board, show board, brand mark, light box board, etc. 4) Industry Uses: Protection board, padding board, luggage carrier, ... Weight, solidly 2) Innocuous, non-taste 3) Pollution-free 4) Waterproof, moisture-resistant 5) Shock resistant 6) Ageing resistant ...