Impulse sterling is the official supplier for the chinese national weight lifting team the impulse sterling power rack is built to meet the demands of high use environments but also has a simple and user friendly design making your workouts effective and enjoyable warranty of the impulse sterling power rack main frames life time moving arms 2 years linear bearings springs adjustments 1 years hand grips upholstery pads and rollers all other parts including end caps 6 months tubing th