The Turbo Tube invention from Frodin Flies has been a revolution for flies fished with loose bodies and hooks.

 These FITS Tungsten Turbo Tubes are a high-density tube with a design that opens up soft materials without collapsing

Available in 17 colours and 3 sizes:
Small: 4mm diameter, 0.5g
Medium: 6mm diameter, 0.9g
Large: 8mm diameter, 1.3g