zhejiang standard part testing center is the only provincial-grade professional testing center for all kinds of standard parts in the whole Zhejiang region set up by Zhejiang Province Quality & Tech Supervision Bureau. It is a third-party impartial testing organization with corporate organization.Iit has passed the evaluation of China National Approvement of Lab Committee(CNAL) and got the certificate of China National Lab. It locates in Haiyan, near my factory. Read more about this Lab