Heat Shrink Butt Connectors feature premium construction for the best results, and they produce a complete environmental seal. These red Marine-Grade heat-shrinkable butt splices feature tin-plated 99.9% pure copper and a seamless tube. They provide maximum clarity for wire inspection and also deliver faster shrink times and improved abrasion resistance. These Butt Connectors can splice wires together quickly and easily. These Butt Connectors are for 8 wire, and they come in a pack of 25 connectors.