Minrock lightly resin bonded rock wool mattresses of densities 85, 100, 120, 128 and 150 kgm3 and thicknesses of 25mm, 40mm, 50mm, 65mm, 75mm, & 100mm are duly machine laid and machine stitched with one sideboth sides wire netting conforming to is: 818393 and are packed in poly-bonded hdpe woven bags.