... door in seconds. 3) Material: Steel, elastic bands, plastic, foam. X-FACTOR:1) 2012 newest door gym2) Attached to your door ... in seconds.3) Material: Steel, elastic bands, plastic, foam. X-FACTOR, FACTORY PRODUCT, GOOD QUALITY, FAST DELIVERY1) 2011 newest door ... chart and 1 pair of handles included210 lbs total resistance X-Factor & Door Gym