These Seachoice Step Down 3-to-1 Heat Shrink Butt Connectors feature premium construction for the best results, and they reliably connect wires of different sizes with a complete environmental seal. These Butt Connectors can connect wires quickly and easily. Simply insert the wires, crimp the connector, and heat-shrink it for an effective seal. A heat gun or even a hair dryer can be used as a heat source. The respective gauges are marked on the ends of the connector, and there's also a corresponding color band, to ensure wires are inserted in the correct ends to produce the best seal. These blue Marine-Grade heat-shrinkable butt splices feature tin-plated 99.9% pure copper and a seamless tube. The proprietary nylon/polyolefin tubing has a 3:1 shrink ratio and adhesive lining. They provide maximum clarity for wire inspection and also deliver faster shrink times and improved abrasion resistance. These Butt Connectors are for 22-18 to 16-14 wire range, and they come in a pack of 10 connectors. Seachoice is committed to delivering quality marine accessories and OEM replacement parts to satisfy fishing, boating and watersports enthusiasts worldwide. Seachoice is run for and by boaters, offering a wide-ranging product line while remaining affordable.