EXTREN® is a proprietary combination of fiberglass reinforcements and thermosetting polyester or vinyl ester resin system. They have a surface veil to protect against glass fibers penetrating the resin surface in service and to increase corrosion and UV resistance.SERIES 525 An all-purpose series utilizing a fire retardant premium polyester resin system with a UV inhibitor. Color: YellowMaterial: FiberglassGrade: Extren Series 525 Shape: Square Tube Height: 2 inchesWidth: 2 inchesThickness: 1/4 inchLength: 12 inches
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