Good quality cork sheet 6mm thick suitable for a wide range of craft and hobby projects, model railway, insulation, coasters, etc. Sheet size: 300mm x 450mm (12inch x 18inch), pack of 4 sheets. Cork is a completely natural raw material, with unique properties. More than half the worlds cork comes from Portugal. The tree has a lifetime 170 - 200 years and the harvesting of the bark is absolutely harmless to the tree. The bark grows back within 9 - 10 years and can then be reharvested. More than 85% of its volume is filled with air which makes it light, impermeable to liquids and gases, elastic and compressible, provides thermal and acoustic insulation, it is a fire retardant and highly abrasion-resistant. Cork sheets can be easily cut and are perfect for pin boards, model making and even acoustic insulation.