ROCKINSUL LRB Mattresses ROCKINSUL LRB Mattresses are flexible rock fiber mattresses, stitched with wire mesh and manufactured from stable rock fibers bonded with a minimum quantity of thermosetting resin binder. ROCKINSUL LRB Mattresses are light weight, strong, resilient, easy to handle and cut to suit intricate shapes. Standard dimensions Thickness(mm) 25 to 140 Width(mm)1.220 Length(m) 1.52to 4.00* Standard density Density(kg/m) Thickness(mm) 80 -40 - 110 100-25 - 100 120-25 - 100 144-25 - 100 150-25 - 100 Facing Types ROCKINSUL LRB Mattresses are available with a galvanized steel or stainless steel hexagonal wire netting (mesh) on one or two sides. Working Temperature Up to 750 °C Fire Safety Performance ROCKINSUL LRB Mattresses are non-combustible when tested in accordance with IS 3144, BS 476 (part 4), ISO 1182 and ASTM E136 and have the following fire safety rating achievements: Class I surface spread of flame in accordance to BS 476 (part 7) Class 0 in accordance to the BS 476 (part 6 & 7) and to British Building Regulations Class A1 in accordance with European norms Show loss in total mass less than 5% when tested in accordance to IS 3144 Surface burning characteristics in accordance to ASTM E84 a: Fire Spread Index: Less than 25 b: Smoke Developed Index: Less than 5