HOODDEAL 100pcs Insulated Heat Shrink Butt Waterproof Wire Electrical Crimp Terminal Connector 10-12AWG 100% brand new and high quality. Guaranteed to hold the strong crimps. Standard crimp and then seal heat shrink butt connectors. 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.