Each gate has(6) 34/” thick gears. Gates are assembled with permanently lubricated, high tensile ally bronze bushing and thrust washer. Bottom of gate is 3/8” thick channel, 1/2” thick at pinch point. The gates are designed to open with a downward motion, eliminating the binding of rock when sliding open and shut. Bottom of gate is constructed of segregated high carbon pipe that will have an abrasion resistance a/r steel. Total height 12’. Note: Consult factory other size gates available