3/4 In. X 1.25 Ft. X 4 Ft. R-2.65 Polystyrene Panel Insulation Sheathing (6-Pack
Sheathing Size 4 ft. x 0.75 in. x 4 ft. Polystyrene Foam Insulation Board. Ideal for both interior and exterior use. Polystyrene foam ensures excellent insulation. Insulation Features Water Resistant.