Solder Seal Wire Connectors - Heat Shrink Butt Connectors - Electrical Wire Terminals - Marine Insulated Butt Splices Included:100pcs 16-14AWG 1.5-2.5 mm heat shrink connectors,An easy one step connection of wires, soldered, insulated and sealed Can be ideal use in marine and automobile applications Polyolefin tubing in outside and hot melt adhesive in inside Solder and seal and with advanced waterproof function Polyolefin heat shrink butt connectors improved pullout strength, provides seal, strain relief, cable check, and insulation Shrinkage ratio 2:1 Dual-walled design tubing: polyolefin tubing on the outside and hot melt adhesive inside Minimum temperature for solder to melt: 138C Minimum shrink temperature: 80C Operating temperature :-55 - 125 Shrink temperature : 160 Dielectric strength :1kv Protection class :IP 67 Color coded connector tubing No wire damage due to lower shrink temperature Reusable case included