Specification: width 920mm length 16.3m thickness 1.5mm,2.0mmFunctions:It has excellent tensile and elongation characteristics. It still remains waterproofing by self-cure even sands or nails pierce the membrane; It provides excellent adhesion with no need special adhesive equipment to form laps and to form a whole layer easily to provide excellent waterproof; fast and easy to be applied and no special tools or workmanship are required; with aluminum foil can reflect insulation in order to keep long term lifetime.Packaging: carton size 25cm*26cm*109cm