This is an inexpensive version of the ITR. You attach the gimmick under your jacket and are then able to pull out the required length of invisible thread. When you let go of the thread it is automatically wound back into the gimmick and ready to use again. You can perform fantastic floating effects with an ITR: Fred Kap's Floating Cork, Floating Banknote, Floating Ball, Floating Cigarette, Floating Origami etc etc. The instructions details many different effects and gives good advice on maintanance. Two sizes available, mini and normal. This is normal size.