constant force spring

We are the manufacturer of spring from china,our products including;compression spring,extension spring,torsion spring,wire spring,Disc Springsand etc.May i ask do you have drawing of the Springswhich you required? So we can quote you the accurate pricing. Please check our web site: www.xzq-spring.com, to know more about our factory.My company email is: [email protected], if there have anything interesting,please feel free to contact us.