Model 3421, 821 or 842. Fifty eight inch inside width by eighty two inch inside length. Two of these covers bolt together to make one cover for a machine. Units are unused. Priced per cover (2 pcs equal 1 cover). Units are aluminum and have four 10" inspection caps in each half cover and there are six handle lugs per half cover. There are also four nylon handles per half cover. Covers are designed for automatic tension Rotex screener. Cover should fit Rotex models 821, 842, or 3421. Price is $ 1,000 for two sections to make a cover for one screener. We have four sections total enough for two screeners.