210Pcs Heat Shrink Butt Crimp Connectors Mixed w/ Solder Seal Wire ConnectorsWATERPROOF Polyamide hot melt adhesive provides excellent waterproof property, can be ideal used in marine and automobile applications. DURABLE Excellent stretch and mechanical damage resistance; Ideally translucent provides tensile strength; High elasticity keeps steady performance. USAGE For best results use a hot air gun until it reduces in size and the adhesive flows, filling gaps within the terminal. WHAT YOU GET Heat shrink wire connectors: 10