Acoustic underlayer, rubber soft mat used under the wood floor, carpet, etc. It has high elasticity, water proof, anti-moist, sound insulation, easy install, etc. Size: 6í»x4í»x5mm to 10mm Material: crumb rubber of recycle rubber with pu elastomer bonding Design: flat both side Packing: 25kgs/roll in the pallets Specification: Hardness: 50 shore a Tensile>=0.8mpa Elongation at break >=100% Tear resistance:3.7-7.1n/mm Thickness : from 5mm to 10mm+/-0.5mm Material : granulate of recycled rubber with a pu elastomer bonding Color: black Key performance: 1) sound insulation 2) simple to install and easy to clean 3) high elasticity 4) moisture proof 5) increase the life of carpet or blanket.