1. Materials: 100% natural gypsum 2. Thickness: 7mm---13mm 3. Sizes: 2400x1200mm, 2004x1220mm, 3000x1200mm as you want 4. Size tolerance: length<±0.5mm, width<±0.5mm, thickness<±0.5mm 5. Weight: 7.5mm=6.7kg/m2, 8.0mm=7.0kg/m2, 8.5mm=7.3kg/m2, 9.0mm=7.5kg/m2, 9.5mm=7.8kg/m2, 10.0mm=8.0kg/m2, 12.0mm=8.8kg/m2, 12.5mm=9.0kg/m2, 13mm=9.2kg/m2. 6. Strength: >160N 7. Characters: non-flammable 8. Edge: tapered or square edge.