The Red GPO-3 Fiberglass U-Channel is used for electrical applications in damp climates. The u-channels are arc and track resistant. Tensile Strength: 10,000-15,000 psi Impact Strength: 8.2-12 ft.-lbs./in. Hardness: Rockwell M95 (Hard) Straightness Tolerance: 0.050" per ft. For Use Outdoors: No Wall Thickness: 1/8 Inch Wall Thickness Tolerance: -0.02" to 0.02 Inch Outside Height: 2-1/2 Inch Outside Width: 4-1/2 Inch Inside Height: 2-3/8 Inch Inside Width: 4-1/4 Inch Length: 3 Ft. Material: Fiberglass Color: Red