Wood: poplar/birch/combi Size: 2440 x 1220 x 9,12,15,18, 21,25, 27mm/ 2500*1250*9--27mm Grade: adequate for concrete works Smooth 2 sides Phenolic film faced on both sides Density of film: brown film(120-125g/m2) or black film Bonding: W.B.P. glue (weather/ boil proof) Edges sealed with water resistant paint Usage: Concrete form