Med-Fit Systems 2009 Nautilus Nitro® Plus Abdominal The Nautilus Nitro® Plus Abdominal machine is the only true abdominal crunch machine     * Four-bar linkage provides a moving axis of rotation that simulates the body's moving       axis of rotation, increasing user safety     * Combination of elbow and back pads with hand grips provide upper body       stabilization, eliminating lower back muscles' static involvement     * Leg anchoring ankle pads provide lower body stabilization     * Controlled motion movement arms isolates abdominal sheath, eliminating hip       flexor involvement     * UPDATE: The contoured seat has been upgraded with a higher density foam to       improve the comfort and durability of the pad. The contours of the seat in the       photo  above may be different than the updated model.   Length    41" (104 cm)   Width 42" (107 cm)   Height 54" (137 cm)   Machine Weight 514 lbs (234 kg)   Weight Stack 200 lbs (91 kg) Core Upper Body Lower Body 1.800.831.7665 1.800.831.7665