BOPURE CO.,LTD is one of main filter media manufacturers in Shanghai who have ability to produce Granular Calcium Sulfite and Copper-Zinc alloy in good quality and competitive price. This products which have been tested by Shanghai Research Institute of Preventive Medicine, can be widely and safely used in drinking water system, and which have successfully entered into the world market, such as Taiwan, Thailand and Malaysia, some countries in the Middle East Asia because of its better quality, competitive price, and prompt shipment (in 1-3 days).