Strong and long-lasting, built for minimum weight and maximum strength. Aluminum conveyors have 2-1/2" x 1" x 1/8" aluminum channel frames, while steel ones have 2-1/2" x 1" x 12 gauge galvanized frames. Wheels are zinc plated to resist corrosion. Available in straight or curved sections. 3' inside radius on curved sections. FOB Shipping Point.