Wide Wire Gauge Range: This kit includes heat shrink butt connectors, ring, male/female spade, and fork terminalscolor-coded to match wire gauges from 26 to 10 AWG. Easily identify and select the right connector for quick and stable electrical work Save Your Setup Time: No need for complicated soldering. Just strip the wire insulation, crimp for initial hold, then heat with a heat gun to shrink the sleeve for a secure, reinforced seal, and let the heat shrink crimp connectors cool down Waterproof & Insulated: Butt connectors feature dual hot-melt adhesive that melts on heat to create a waterproof seal rated IP67