Comparison : Item # SQ011.101.240A, 1 Inch (in) Size Isophthalic Polyester (I) Fiberglass Solid Square Bar
Item # SQ011.286.240A, 1 Inch (in) Size Isophthalic Fire Retardant (IFR) Fiberglass Solid Square Bar
Item # SQ011.303.240A, 1 Inch (in) Size Vinyl Ester Fire Retardant (VFR) Fiberglass Solid Square Bar
Item # SQ020.101.240A, 1-1/4 Inch (in) Size Isophthalic Polyester (I) Fiberglass Solid Square Bar
Item # SQ020.105.240A, 1-1/4" x 20' / Series 1500 (I) - Yellow