The trolley wheel sets consist of wheel, wheel shaft, retainer. We can provide the service including the processing and fitting of all kinds of trolley. We will spare no effort to provide you with highest quality and good service. Welcome worldwide customer to contact us. drawing: we make professional manufacturing procedure according to your original drawing that be translated, offering best suggestions on design. quality:We have full set quality control system to guarantee best product quality. Depends on the products, we make different Item Testing Plan, different Manufacturing procedure etc. inspection:We have professional inspectors. All these inspectors are qualified. our contacts: Mr. Jin Shang Tel:0086-15998411003 Fax:0086-0411-39511116