9~13layer film faced plywood,pine/poplar core,WBP/MR glue,edges sealed with water resistant paint. Use:concrete form Specification:1220mm*2440mm*12/15/18/20/21mm PSF:black/red both size sanded 120,140g/m2, surface Type:smooth/smooth. Face/Back:okoume/meranti/radiate pine/china pine. MDF:pine core and hardwood, 1220*2440*8/12/18 E2standard Veneer:okoume veneer:4*8" from 0.18~0.5mm Blockboard:Okoume/lauan faced blockboard, china fir rectangular bar core size:1220*2440*12~18mm