About Us

• Ningbo Haishu Dualstar International Trading Ltd. was established in 2000, we are an expert to provide custom manufacturing services for Small-Medium-size Enterprises in Europe and North America, from Prototype to Production.
  
  Near Hangzhou-Bay bridge, 28Km away from Ningbo city, the factory has an area of 3,000 square meters, equipped with tooling workshop, CNC machining workshop and assembly workshop, ISO9001-2000 was certified, with 100 employees, now we serve customers from USA, Australia, Sweden, Belgium, France and Holland and reached 5 million US dollars sales amount in 2013.
  
  Our main products include:
  
  1. Precise Valve Body and Sensor Body
  
  2. Castings, CNC machining and Assembly
  
  The main industries we serve include electronic, medical, laboratory industry and our part can achieve H7 and some up to H6 precision.
  
  Below are the raw materials involved: Metal materials including ferrous metals like carbon steel (Q235), stainless steel (304, 303, 316L), and non- ferrous metals like aluminum (A356-T6, A380, A360), brass (C83600), zinc alloy (Zamak 3, Zamak 5), etc.
  
  The surface treatments include polishing, shot blast, passivation, chromate, sand blaster, chrome plating, painting, zinc plating, nickel plating, tin plating, anodizing and silk screen.
  
  We are able to provide both semi-finished and finished products. Please send us drawings and samples, we will respond within 24 hours.