Simplify your electrical wiring jobs with these 3M™ Scotchlok™ Butt Connectors. Their chamfered barrel ends and built-in wire stops make wire splices quick and easy. Just insert a stripped wire lead through each end, and crimp to create a flawless connection. Their tin-plated copper barrels fight corrosion, and durable nylon insulation guards against shorts. Their blue color-coding indicates that these butt connectors fit pre-stripped stranded wiring sized 16 to 14 AWG, and their seamless barrels hold fast when crimped. Use these butt connectors with confidence knowing theyre UL Listed, CSA Certified and RoHS 2011/65/EU Compliant.