Back Extension A128 Seat and foot platform adjust to provide proper body positioning and alignment with the axis of rotation. Biomechanical cam effectively maximizes muscle loading. Adjustable seat belt is provided to keep body in proper position during exercise. Maintenance free pillow block bearings enhance the smoothness through the range of motion. Specifications: Size: 38"(W) x 40"(L) x 62"(H) Stack Weight: 250 lbs. (25x10lb) Shipping Weight: 410 lbs. Target Muscle Groups - Back and Glutes Features: Adjustable Foot Platform Angled Seat Full Range Movement Kevlar Drive Belts for Longer Life and Smoother Performance Moulded Feet for Floor Protection Protective Weight Stack Shields Solid One-piece Frame Construction comprised of 2x3" and 2x2" tubing Superior Grade Foam and Mildew-resistant Naugahyde