This Silicone Tube has a multitude of different uses, but the main one is holding the hair in place on your hook. It comes in two versions – 0.5mm and 0.75mm – to ensure that it will fit any hook size and diameter of hair material, trapping it securely but sliding up the shank if it needs to once a fish is hooked. It is Weedy Green in colour and there is 1.5m of it in a pack.