What should I notice?Note:The product is manual measurement, there is a little error, please refer to the actual product. How to use it?Jump wire set is easy to identify each wires in your DIY or prototype; And will easy to support different connection: bread board hole, pin header, female header or other connectors with different pins. Very secure connection to the pins, direct connection, also for fast circuit testing. MECCANIXITY DB37 Ribbon Cable - 37-Pin Male To Female Flat Cable 11.8 Jump wire set is easy to identify each wires in your DIY or prototype; And will easy to support different connection: bread board hole, pin header, female header or other connectors with different pins. The Jumper wire PVC material; insulated and flame retardant, high temperature resistant wire; safe and durable; small pins and sockets at both ends of the wire,direct connection, plug and play, easy to connect when conducting circuit experiments. What is this?The electronics breadboard Jumper cable can be used for connection during circuit experiments and also for breadboard / Electronic projects / DIY experiment / PC motherboard / PCB project. Discount Electronics Breadboard Wires MECCANIXITY Male To Female 9Pin Breadboard Jumper Wire 2.54mm Pitch Male To Male Jumper Wires Male To Female Jumper Cables Uxcell XH Female To Female 9 Pin Breadboard Jumper Wire 2.54mm Pitch Ribbon Cable 20cm Length Dupont Cables