... thick Tolar TM plate - 29dB 8) Heat Resistance: Thermal conductivity of 0.216W/mK 9) Durability: Resistant to halogen accumulation, long ... , saw, nail, stick, paint and veneer 12) Environmental friendly: Free of asbestos, formaldehyde and ammonia Specifications: 1) Size: 1220*2440mm ,1200 ... - 20mm Special dimensions manufactured according to particular requirements from customers. magnesium oxide board