Comparison : Item # PFGC983876, Fiberglass, Extren Fiberglass Series 500, Channel, 1 1/2 x 1 x 3/16 inches
Item # PFGC838844, Fiberglass, Extren Fiberglass Series 500, Channel, 1 1/2 x 1 1/2 x 1/4 inches
Item # PFGC983865, Fiberglass, Extren Fiberglass Series 500, Channel, 2 x 3/16 x 1/8 inches
Item # PFGC983867, Fiberglass, Extren Fiberglass Series 500, Channel, 3 x 7/8 x 1/4 inches
Item # PFGC983869, Fiberglass, Extren Fiberglass Series 500, Channel, 4 x 1 1/16 x 1/8 inches