3M Performance Plus Wire Connector R/Y+ is used to connect and insulate copper wires in a variety of industry applications. The quick-biting spring creates secure, reliable connections, while generous room for expansion allows 1 connector to replace traditional red and yellow connectors. Made in the USA. 3M Performance Plus Wire Connector R/Y+ features a spring that expands for greater wire-taking range and reuse, allowing 1 connector to do the job of a traditional red and yellow (22 to 8 AWG). The quick-biting spring creates secure, reliable connections, while wings enable easy, high torque installation. The flexible skirt helps prevent copper exposure for enhanced safety. UL Listed and CSA Certified."