16 Rolls of STAINMASTER Waterproof Vinyl Foam Underlayment for use under vinyl plank. Each roll measures 3 ft wide by 25 ft thickness long comes out to be 1200 total square feet 2 mm thickness (covering 75 sq ft), providing reliable moisture resistance, improved sound absorption, and comfortable underfoot support. Perfect for a smooth, secure flooring installation. 16 rolls meaning $25/roll msrp is around $50
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