Korda Shrink Tube is perfect for improving the hooking efficiency of any hook by curving the hooklink inwards. Shrinks down to one third of its original size to form a really neat presentation. Small - 1.2mm bore for hook sizes 8 - 10. Medium - 1.6mm bore for hook sizes 4 - 6. Extra Large - 2mm bore for hook sizes 1-2. Available in Weed only. 8 x 55mm lengths per pack.