Fiberglass Rolls FIBERGLASS FOUNDATION BLANKET R12 4'X50' Product Code: 17130001-00 $186.99 FIBERGLASS FOUNDATION BLANKET R12 3'X50' Product Code: 17130002-00 $142.99 FIBERGLASS FOUNDATION BLANKET R20 4'X35' Product Code: 17130010-00 $225.00 FIBERGLASS FOUNDATION BLANKET R20 3'X35' Product Code: 17130012-00 $178.99