Comparison : Item # IB340.101.240A, 3 x 1-1/2 x 1/4 Inch (in) Size and 1400 Feet (ft) Mill Run Isophthalic Polyester (I) Fiberglass I-Beam
Item # IB340.286.240A, 3 x 1-1/2 x 1/4 Inch (in) Size and 1400 Feet (ft) Mill Run Isophthalic Fire Retardant (IFR) Fiberglass I-Beam
Item # IB340.303.240A, 3 x 1-1/2 x 1/4 Inch (in) Size and 1400 Feet (ft) Mill Run Vinyl Ester Fire Retardant (VFR) Fiberglass I-Beam
Item # IB440.101.240A, 4 x 2 x 1/4 Inch (in) Size and 1300 Feet (ft) Mill Run Isophthalic Polyester (I) Fiberglass I-Beam
Item # IB440.286.240A, 4 x 2 x 1/4 Inch (in) Size and 1300 Feet (ft) Mill Run Isophthalic Fire Retardant (IFR) Fiberglass I-Beam