With Fiber,cement,paper pulp ,with the high temperature and high pressure it is a good board for the exterial wall.
water proof : Through water immersing for 24th, no water drop appeared on bottom surface

Freezing proof : Through cyclically freezing and melting 25 times, no damage stratification

Other advantage : damp-proof , Fire proof ,Good heat and sound insulation , no asbestoes

Max Lenth :3600 mm

Max Thickness: 20 mm

Max Width:1220 mm

Standared size: 1220*2440*3--20mm

Density : 1.1--1.7