The perfect links for a Dacron connection set-up. The rubber bead is very soft and comes to a fine point to push out the Dacron to the perfect angle. They have been designed to colour coordinate with the range of Middy Hi-Viz Shockcore hollow elastic (7 grades) and can be used on solids as well. The F1-Carp 4-8 elastic works perfectly with a Nano-Core F1 kit.