This is Nanjing Yuyang Metalwork Co., Ltd in China. May I please introduce our company, We are a manufacturer specialized in manufacturing scaffolding fittings, scaffolding tube and scaffolding : Cuplock System, Ring System and Kwikstage System scaffoldings, with faculty of more than 1000 workers and employees. All our products are strictly confirmed to international standard of BS1139, EN 74 and AS1576.And we get certificate on couplers from SHEFFIELD TESTING LABORATORIES. And more than 120 scaffolding containers are being sold from our own factory per month. We are dealing with many famous scaffolding companies from all over the world. An experienced senior foreign engineer who used to work for SGB in UK controls the overall process. 100% slip and distortion test day and night. Furthermore, each product has traceability mark and code, which shows the production date and PO number. We enclose in every container with test certificate. We hope we can become your supplier in China, and keep long business terms with you and your company on mutual benefits. our high-quality products, more experience exporting our products to worldwide market can bring our two parts more benefits. Please browse our website: www.njyuyang.com , you can get more information about our products and company.