Dock Door Ribbed Design White Opening Height 10 ft Opening Width 8 ft 10 in Door Material Steel Door Height 10 ft Door Width 9 ft Door Thickness 2 in Minimum Height Clearance 21 ft Insulated No Includes Windows No Gauge 24 Finish Painted Acrylic U Shaped Bottom Astragal 14 ga Hinges HD Commercial Rollers with (10) Ball Bearings 2 in Angle Mounted Full Vertical Lift Track and Leaf Bumpers