Pro Tube Fly Tying System Combo Starter Kit with Flexineedle Vise Adapter - Tube Flies Starter Pack The Pro Flexitube system is a revolution in tube design for flies - Flexineedle Vise Adapter included! This kit is an excellent introduction to the complete Pro Tube line-up Includes a wide selection of tubes, weights, heads and and other goodies Just add materials and you can tie dozens of cool and unique tube flies