12mm large size high density polyethylene board for water tank Our Blue High Density Polyethylene Sheets are made by moulding press, thickness 6mm~300mm. Blue lor is customized. mmon full size of per sheet is 4*8ft (1220*2440mm), other size 1220*1220mm, 1220*1000mm, any size can be customized, we offer customize service, HDPE Sheets can be cut