Two #14 minimum wire and two #10 with two #12 maximum wire Color-coded for easy size selection Makes quick, secure connections for positive continuity, tightens without ratcheting, yet removable for re-use Tough, thermoplastic shell shields against environmental extremes, smooth surface eliminates porosity and cracking Resists chemical action from hydrocarbons, dilute acid or alkaline solutions Flame retardant properties resists heat distortion up to 105 degrees C, 221 degreesF High-dielectric shell features deep skirt design to prevent exposure of bare wire Copper to copper connections only Superior flash-over protection Versatile size selection covers building wire combinations from #18 to #10 AWG Wire Size: 18-8 AWG