RS Nylon Insulated Crimp Male Crimp Tab Terminals Nylon insulated brass male double crimp tab terminals with a copper sleeved double crimp barrel. These insulated male tab connectors are Color coded for use with different wire ranges and are available with various tab sizes. For suitable crimp tool see stock number 267-3133. Red 0.5 - 1.5 mm2 Blue 1 - 2.6 mm2 Yellow 2.5 - 6.5 mm2