Reflectix 48 in. W x 50 ft. L R-3.7 to R-21 Reflective Radiant Barrier Insulation Roll 200 sq. ft. Reflectix BP48050 48" X 50' Bubble Pack Insulation Features For the Pro or DIYer, this large roll size is perfect for the larger square footage projects The Reflectix Double Reflective Double Bubble Insulation consists of two highly reflective (94% reflectivity) layers of film Two inner layers of insulating bubbles resist conductive heat flow while a center layer of polyethylene provides high reliability and strength (nominal thickness 5/16") USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.