Ketofa 20x Insulated Heat Shrink Butt Wire Electrical Crimp Terminal Connector 14-16AWG Blue connector: Suits cable/ wire sizes 1.5-2.5mm2 14-16AWG Guaranteed to hold the strong crimps Dual-walled design, polyolefin tubing in outside and hot melt adhesive in inside Allows visual inspection, prevents corrosion, and provided a waterproof seal For best results use a hot air gun until it reduces in size and the adhesive flows, filling gaps within the terminal