172 Pcs Clear Heat Shrink Tubing Kit Adhesive Lined Wire Tube Wrap Kit
It is 3:1 heat shrink ratio, and will shrink up to 1/3 of original, only use a lighter heating if the tube is small or hair dryer heating for large one. Insert the wires to the heat shrink tubing, then use a lighter heating if the tube is small or hair dryer, heat guns heating for large one until the wire was wrapped tightly.