Jumpstretch Strong Band #6 100 pound resistance for Power lifting 25 years experience in rubber band strength training, made by the same factory in Sro Lanka that made the original Jumpstretch Flexbands No Bonding, moulding or seams are used Bands are built in layers on mandrels with no seams for potential breakage. They are backed by full 1 year warranty 41" long, 1/4" thick Train Quick to be Quick