Sopoby 480pcs Heat Shrink Wire Connectors, Waterproof Butt Connectors for Electrical Automotive Marine Repairs, Insulated Spade Ring Terminals, AWG 22-10 SHRINKABLE - Shrinkage Ratio: 3 : 1 *** Comply with all relevant European Standards. WATERPROOF - Polyamide Hot-melt Adhesive, ideal used in Marine and Automobile Applications. DURABLE - Excellent Stretch; Mechanical Damage Resistance; High elasticity. USAGE - Heating with a hot air gun until it reduces in size and the adhesive flows, filling gaps within the terminal. TEMPERATURE - Operating temperature: -55125*** Minimum shrink temperature: 80C*** Fully recovery temperature: 130C.