SOLOOP 100Pcs Heat Shrink Butt Connectors Crimp Electrical Terminals Heat shrink wire connector 16-14 AWG Kit Blue 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 Heat shrinkable sleeving is non-toxic, easy to recycle, has no toxic effect on human body and environment, and meets environmental protection requirements