Red | 22-18 Gauge - Wire range (0.5-1.0mm²). Blue |16-14 Gauge - Wire range (0.75-2.5mm²). Yellow |12-10 Gauge - Wire range (0.5-1.0mm²). Nylon Fully Insulated Male Spade terminals: Red | 22-18 Gauge Wire range: 0.5-1.5mm² (Max current 10A). Blue |16-14 Gauge Wire range: 1.5-2.5mm² (Max current 15A). Yellow | 12-10 Gauge Wire range: 4-6mm² (Max current 24A). |