Currently, the wires used by this company include Japan's piano wires (German Angel piano wires), high-tension steel wires, stainless steel wires, phosphor bronze wires and general steel wires.   Wires with diameters over 0.08mm is used for multi-layer processing and fabrication for making compressive springs, tension springs and torque springs. During the manufacturing process, all wires are strictly tested to ensure the product performance and specifications are met to maintain a high quality level. During the test, the advanced computer Spring Force Tester, Tension Tester, Torque Tester and projector are used to ensure the quality and the "zero-defect" requirement. The quality is further guaranteed under the support of fully-automated production, monitoring and simplified system. The wire selection concerns much with the spring force and service life: SWC Hard-drawn Carbon-base Steel Wire (80c) : Homogeneous and stable hardness of the wire is in presenting high-precision spring for the manufacturers. SWP Piano Wire : Homogeneous hardness of the wire in presenting stronger spring force and higher stability SUS Stainless Steel Wire : Nickel-plated surface treatment on top of which, further rustproof finishing can be performed as required. PBW Phosphor Bronze Wire : Bright surface finishing in presenting satisfactory wire guiding rate and elasticity.