... this line, we can design and manufacture the products according to the specification,drawing and samples.3. The advanced equipment,fine ... as per as customer requirements.1.Rings:In addation to Bronze,copper,red brass,stainless steel and steel ring compostions can be ... you are interested in our products , please don't hesitate to contact us.Contact person : LEO ZHENGWENZHOU MDOA ELECTRIC CO LTD ...