1、Both ends of all jumpers have been peeled off, and prefabricated right‑angle wires for easy insertion into the breadboard. 2、The kit contains 140 jumpers, with 14 different lengths to choose from, which can meet the various wiring needs of the breadboard. 3、The outer skin of these jumpers is colored, which can be better distinguished and marked when used. 4、Can be used to expand the pins of the experiment board, without soldering, and can be used for fast circuit testing. 5、Very suitable for any breadboard, prototyping, prototype circuit, LED strip, test circuit, etc. 140 x Jumper Wires Item Type: Jumper Wire KitMaterial: Aluminum + CopperJumper Wire Length: 2mm, 5mm, 7mm, 10mm, 12mm, 15mm, 17mm, 20mm, 22mm, 25mm, 50mm, 75mm, 100mm, 125mmApplication: Computers, electronic communications, instruments, meters, industrial program control, digital cameras, MP3, card readers, DVDs, LCM/LCD displays, electronic toys, PCB engineering, PC motherboards, etc.Purpose: Widely used in the connection of electronic projects. It can be used to expand the pins of the experiment board and increase the experiment items. It can be connected to the pins very firmly without soldering, and is used for fast circuit testing.