A China Mold Maker,Mold Manufacturer in China, Plastic Molding Maker in China DONGGUAN SINCERE TECH CO.LTD is professional in plastic injection mould making, rapid prototype mould making as china mould maker. Located in DongGuan, China, and established in 2004, SINCERE TECH specializes in various plastic injection molds and custom Published 5 Years Ago by RobertNelson2