Wire Size: 5.00mm-12.00mm Standard: EN 10270- ... : High carbon steel wires, spring steel wires, mattress spring wire, high carbon spring steel wires2. Material: Steel GradeGB StandardCarbon ... GB 4357-894. Main Markets: Argentina, South Korea, Israel, Malaysia, Pakistan, Thailand, Philippines, Sri Lanka, Iran, Syria, Brazil, South Africa, ... 82B Rolling Shutter Doors High Tension Spring Steel Wire