This DiversiTech® 6-12-4 Metallic connector, 1/2 in. conduit size, #10 THHN wire size, 4 ft. length with liquid-tight flexible conduit system. A labor saving convenience kit for A/C unit hookup. Also use for heat pumps, refrigeration, hot tubs, swimming pools and outdoor lighting with three distinct wire colors for ease of hook-up. U.L. and C.U.L Listed.