Suitable for Australian home ceilings. Hanjiang's ceiling batts are a resilient and compressible insulation manufactured from the controlled felting of glasswool. The batts provide both thermal and acoustic insulation, it is easy to install in the home. Hanjiang's ceiling batts has been tested and are fireproof.The batts are supplied in two conventional widths to suit standard housing construction: 430mm width for joists spaced at 450mm centres, as well as 580mm width for joists spaced at 600mm centres. Batts is installed by laying them on top of the ceiling in between the ceiling joists. Specifications Product: Glass Wool Ceiling Batts Density: 12kg/m3 Thickness: up to 180mm Length: 1160mm Width: 580mm or 430mm Packaging: PP plastic & PE woven bags, compressed 20pcs for 1160*430 and 16pcs for 1160*580 per packet