Black Jack 100 sq. ft., 28 ft. x 43 in. x 2.5 mm Roll of 2-in-1 Premium Laminate and Engineered Wood Flooring Underlayment 100 sq. ft. coverage with rolls measuring 28 ft. x 43 in. x 2.5 mm For use under laminate and engineered wood flooring Dense, closed cell structure offers moisture, mold and mildew resistance Offers cushioning, sound reduction, resistance and levels minor subfloor imperfections Easy installation with plastic overlap and adhesive strip