Dock Door Embossed Design White Opening Height 8 ft Opening Width 8 ft 10 in Door Material Steel Door Height 8 ft Door Width 9 ft Door Thickness 2 in Minimum Height Clearance 17 ft Insulated Yes Includes Windows Yes Gauge 26 Finish Painted Acrylic U Shaped Bottom Astragal 14 ga Galvanized Steel Hinges HD Commercial Rollers with (10) Ball Bearings 2 in Angle Mounted Full Vertical Lift Track Leaf Bumpers and (2) Windows