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With over 10 product lines manufactured in accordance with ISO9001:2000 quality control, our customers have the assurance of knowing that we can provide satisfaction for all compression springs, extension springs, torsion springs, clock type springs and wire forms.Our company specializes in manufacturing all kinds of bicycle fittings springs, such as seat springs, brake springs, torsion springs seat and so on.tension spring Kickstand apring,torsion spring extension spring metal spring manufacture