#2307 • (10) 4'x4' Paratherm Taper ISO Panel FF Insulation Sheets Part of GAF EnergyGuard Polyiso Insulation: 4'x4' and 4'x8' (163709) (timed auction by Bid-2-Buy) Status: Sold 4" - 4.5" 20 PSI (10) Pieces = 160 Sq. Ft.