sound proof gypsum board

Specifications: 1) Material:plaster board,sound proof gypsum board,With PVC facing & Aluminum Foil Back 2) Thickness:7mm,7.5mm,8.0mm,8.5mm, 9mm,9.5mm,12mm,12.5mm 3) Sizes: 595 x 595mm, 600mmX600mm,595 x 1195mm, 603 x 603mm, 605mmX605mm,603mm x 1212mm,610mmX1220mm(2X4) 4) Size tolerance: length <±0.5mm, width < ±0.5mm, thickness <±0.2mm 5) Weight: 7mm=5.5kg/sqm,7.5mm=5.7kg/sqm,8.0mm=5.9kg/sqm,8.5mm=6.2kg/sqm,9mm=6.8kg/sqm,9.5mm=7.1kg/sqm,12mm=9.2kg/sqm,12.5mm=9.5kg/sqm 6) Strength: >160N 7) Characters: non-flammable B1, in accordance with Chinese standard GB8624-1997 8) Installation: match with ceiling T-bar 9)Packing:Export carton(8pcs or 10 pcs per carton with film)