8mm large size HDPE board for Horse Stable Partitions-HDPE 8mm hdpe plastic sheets White-HDPE sheets 4×8, Custom HDPE Highly resistant to rrosive chemicals except oxidizing acids. Production Techniques and Equipment Our 8 x 4 white plastic sheets are made by moulding press, thickness 8mm~300mm. mon full size of per sheet is 4*8ft (1220*2440mm).