Specification: Material:  Iron/Nylon/Rubber.  Colour:  Black.  Applicable scene:  fitness and bodybuilding/pull-up/arm training.     Features: 1. Multi-function Pull Up Assistance Band Pull-up Auxiliary Band is not only very suitable for gym assistance, such as pull-ups, strength improvement, and push-ups. It also improves muscle strength in the chest, arms, legs, shoulders and back.  2. Increase Strength and Muscle Gains - perfect for weightlifting, bodybuilding, pullups and general fitness this dip lifting belt helps target the pec major, pec minor, triceps, rhomboids, traps, and deltoid muscle groups.  3. Adjustable Resistance -- The resistance straps are connected by spring snap hooks, which make them very easy to detach or install to fit your training purpose. The length of the nylon straps can be adjusted in a few seconds to make the chin up assistance bands ready for your pull-up or chin-up.     Package included: 1 x Natural Rubber Sheet.  6 x 50lbs Tension Tube.  4 x Lanyard.  6 x Carabiner.  1 x Storage Bag