CARBON STEEL CONSTRUCTION. ALUMINUM LIFT UP DOOR. SHOP # 10186-1; SIZE 54 IN.; SERIAL NUMBER BD-727; CUSTOMER # BU-01980. 8" DIAMETER VENT; APPROXIMATE SIZE: 54" WIDE X 39" FROTN TO BACK X APPROX 9' TALL. NO INTEGRAL DUST COLLECTOR. DESIGNED TO VENT TO REMOTE DUST COLLECTOR ( Sold separately).