Features: 1.wire diameter are according to your demand. 2. Made of carbon steel, piano steel, alloy steel, iron and plated steel 3. Used in telecommunication, medical instruments, optical equipment,power supply, switches and computer peripherals 4. First-class quality and customer designed shapes; 5. OEM is provided; 6.Plastic bags/ Inner carton/outer carton packing; Additionals: We produce all kinds of spring according to our clients demand.