Roll of acoustic underpad (Richmond Hill)

I have a roll of this underpad that you would put under laminate flooring or possibly hardwood flooring. I don't want to unroll it to figure exactly how much but I estimated to be about 5 to 10 m but I could be way off. The thickness of the roll is 4 ft or 122 cm. The thickness of the rubberized pad itself is 3 mm. I've never used it, because I put down a subfloor that doesn't require it.

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