#2237 • (12) 4'x4'x4" EnergyGuard Ultra Sloped Poly Insulation Sheets Part of GAF EnergyGuard Polyiso Insulation: 4'x4' and 4'x8' (163709) (timed auction by Bid-2-Buy) Status: Sold 4" 25 PSI (12) Pieces = 192 Sq. Ft.