Specification:Thermal bubble foil insulation/Under Concrete heat insulation/ Environmental-friendly& Low cost aluminum bubble foil insulation Size:1.2*30m/40m/50m/100m per roll or other sizeBubble Diameter:9mm,10mm,14mm,20mm,25mmBubble Thickness:2.5mm to 10mm Diameter: 9mm,10mm,20mm,25mmWeight: 140gsm to 600gsmWidth: from 30cm to 200cm..