Thickness: 12mm or 1/2''
Roll Size: 4' x 25' - 100 sq.ft.per roll 
Weight: 2.0 lbs per sq.ft. 
Density (ASTM D-792): 43 lbs cubic ft
Hardness A Shore Durometer: 40-55
Uses: Sonus HS500 can be installed under carpet, tile stone and all kinds of hardwood or lamintate flooring.