Think Bus Kalung ( HK ) manufacturing Ltd. Think Bus Kalung ( HK ) manufacturing Ltd., is an ISO 9001 certified management system factory located in Guangdong Doungguan City, China.Privately owned company specializing in manufacturing high-quality injection moulds, plastic injected products for the international ***** equipped with CNC, EDM machines to provide high precious measurement. Injection machine are 600tons. As to be one-stationed store to customer, we also provide some electronic products; transformers, coils and power supply are the main products. We also provide cutting, tinning , wire stripping , twisting ; terminal connector insertions and wire assembly jobs.