Pinnacle Series, 25.5, Aluminum Attic Ladder, R-10 Insulated Door, Pre-Stamped Easy Fit, Advanced Gas Strut Design, 375 LB Heavy Duty Load Capacity, Dimensions Rough Open Ceilings 25.5" x 54", Fits Ceiling Heights Minimum 7.7" To Maximum 10.3", Landing Space Is 69", Project Width 74".