If you order 15sqm you will receive 1 x 15sqm full roll of underlay. 15sqm you will receive a piece of underlay 1.37m x 11m. • 12mm thick - 5 to 15sqm - UK manufactured. coverage - from 5sqm - 15sqm. This 12mm thick carpet underlay is part of the "Magic" range of underlay made in the UK by Carpenter in Hadfield Glossop UK, Carpenter and is the world's largest producer of foam.
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