Enjoy the versatility of these 3M™ Scotchlok™ color coded Heat Shrink Butt Connectors. Transparent heat shrink tubing covers the seamless barrels to create a seal that blocks water, salt and other harmful substances after you perform the crimping and heat shrink. They are pre-insulated with red vinyl to provide color-coding for fast, trouble-free identification of the required wires. The tubing on these butt connectors also delivers excellent stress relief and improved pullout strength once they've been shrunk. Corrosion-resistant tin plating rounds out the features on these connectors and provides an added layer of protection. This product is UL Listed, CSA Certified and RoHS 2011/65/EU Compliant.