3M™ secure grip wire connectors are designed to give you dependable performance for a wide-range of residential and commercial wiring jobs. An internal, insulated spring delivers a powerful grip for secure, solid connections that are made to last. The slip-resistant ridges and straight wing design make installation fast, simple and easy on fingers. 3M™ secure grip wire connectors are available in a variety of colors/wire ranges. SG Y (yellow) 2 #18 3 #12, SG T (tan) 3 #18 3 #10, SG g (green grounding) 3 #14 3 #10 (solid only), SG r (red) 3 #14 2 #8, SG B (blue) 6 #14 2 #6. UL listed. 3M™ performance Plus™ wire connectors are UL listed for 600 V on copper wire. They are available in five color/wire range options: O/B+ (orange/blue) 2 #22 - 3 #12 AWG, T/Y+ (tan/yellow) 2 #22 - 3 #12 AWG, R/Y+ (red/yellow) 2 #18 - 2 #8 AWG, T/R+ (tan/red) 2 #18 - 5 #12 AWG, B/G+ (blue/gray) 4 #14 - 2 #6 AWG.