E Support 50Pack Red Heat Shrink Butt Wire Electrical Crimp Terminal Connector 18-22 AWG Gauge Standard crimp and then seal heat shrink butt connectors 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 Red connector: 18-22 AWG