Our special formulation of silicone rubber makes this the strongest tubing available in the modeling industry that is still very flexible. This tubing is for the modeler who wants the best and to eliminate situations where other tubing has failed due to vibration and abrasion. It's great for helicopters, boats and aircraft. It virtually eliminates the problem of tubing walls being cut or damaged. Super "X" Silicone, Large (3/32" ID) 2ft pkg