Tumbler GR-I and GR-II、III is a new generation developed on the basis of our traditional vacuum tumbler, Type I is electric-mechanical control  and Type II、III is PLC&HMI control. The tumbler is made of quality stainless steel; reasonable structure, durable construction, stable operating,  failure-free vacuum and filter, energy saving, high efficiency and simple to use. Type III is all Stainless steel, fine polishing.