Nasa Tech Heavy Duty Reflective Foam Core Non Fiberglass (Fits 40, 50, and 60) 42sqft of Heavy Duty Reflective Foam Core 1/4inch R8 Insulation 20ft of foil tape instructions Made in the USA Save Money, Energy and Help the Environment!!! SAVE 2x MORE WITH OUR PRODUCT!!! 1/4inch THICKNESS!!! R-VALUE 8.2!!! Reduce Heat Loss by 40% !!! Recover Your Investment in a few month!!! Fits All 20 to 80 Gallon Tanks / Fits Gas or Electric Water Heater (42sqft material) = 4ft x 7ft / 2ft x 7ft Easy to Install and Easy to Clean , Contains no Fiberglass, Non toxic / Non carcinogenic Made in the USA Save Money, Energy and Help the Environment!!! SAVE 2x MORE WITH OUR PRODUCT!!! 1/4inch THICKNESS!!! R-VALUE 7.2!!! Reduce Heat Loss by 40% !!! Recover Your Investment in a few month!!! Fits All 20 to 80 Gallon Tanks / Fits Gas or Electric Water Heater (42sqft material) = 4ft x 7ft / 2ft x 7ft Easy to Install and Easy to Clean , Contains no Fiberglass, Non toxic / Non carcinogenic