The Nautilus four-stack commercial weight machine combines all the features and technology used in Nautilus’ world famous Nitro™ Club Line into one all-inclusive strength system. Perfect for hospitals, hotels, schools, apartment complexes or other places limited on space but unwilling to compromise the fitness standards they’ve come to expect from Nautilus. Built with the highest quality commercial grade materials including 11-gauge steel frame, solid steel weight plate guide rods, high density 1” foam padding with double stitched upholstery, the NS 4000 is built to take on all users.The NS 4000 uses four separate 90 kg. weights stacks allowing four users to exercise simultaneously. All weight stacks are fully shroud for maximum safety and increased user privacy. For added convenience, each exercise station features instructional placards to demonstrate machine setup, proper form and targeted muscle groups. Each adjustment is color coded to the machine for greater convenience.