The website of Hangzhou Biaozheng Rubber and Plastic Parts Factory is online

We are Custom Rubber Diaphragm Valves Manufacturers and Pneumatic Actuator Valve Diaphragm Suppliers in China. All sub-suppliers are inspected and reviewed, and all product procurements are conducted only in qualified sub-suppliers. The raw materials, purchased parts, and outsourced parts provided by the sub-suppliers must undergo a rigorous review when entering the factory.