Description: Durable and Excellent Crimp Pin Connector: Made of durable plastic and metal, tin plating, internal pure copper to increase the conductivity, the surface coating antioxidant, increase the life. Widely Applied: These premium jumper wire pin connectors are compatible with , and works great on your typical breadboard style pin connectors and sockets, like 3D printer boards etc. Easy to Use: Just put the crimps in the tool and press them, make the crimp the insulation are all the way toward the wire. 420PCS Dupont Connectors Kit: 1x1P*50, 1x2P*40, 1x3P*20, 1X4P*20, 1X5P*20, 1X6P*20, 2X2P*10, 2X3P*10, 2X4P*10, 2X5P*10, Male Crimp Pin Connector*100, Female Crimp Pin Connector*100. One Quality Plastic Case: Comes with a reusable storage case with 11 cells, each is in suitable size for pin housing connector and male female Dupont crimp pins. Always keep compact and organized. Specification: Material: plastic + metal Box detailed size: 170 x 100 x 22mm / 6.69 x 3.94 x 0.97inch Wire gauge: 18-26awg Pin spacing: 2.54mm (0.1 ") Rated voltage: 250V Rated current: 3A Working temperature: 25 degrees to 85 degrees Package Includes: 50 x 1x1 40 x 1x2 20 x 1x3 20 x 1x4 20 x 1x5 20 x 1x6 10 x 2x2 10 x 2x3 10 x 2x4 10 x 2x5 100 x Male Crimp Pins 100 x Female Crimp Pins 1 x Plastic box