Elite Series, 25.5" x 54" Rough Opening, Ceiling Height 7' 8" To 10'.3", 67" Landing Space , 74" Swing Clearance, Pre Drilled Holes In Frame, Aluminum Attic Ladder, Rated Up To 375 LB, A New Installation Procedure Using Temporary Support Boards Vs. Metal Straps Stands More Stable, New Window To See The Cylinder Design, Blister Pack, Lag Screws, Straps To Hold Pistons, New Pistons 400 NW Force, Larger & Reinforced Angle, New Omega Holds Piston & Spreader Brace, New Spreader Brace & New Orientation, Strap Holds Three Sections For Easier Installation, New Label Don't Remove Strap, Pre Assembled Shoes For Shipping.