The moulds developed by the factory have such advantages as high precision, excellent compatibility and long work life. Produced by exquisite and comprehensive technology, the moulds reach the top-ranking quality. By using high-quality raw material and conducting routine physical and chemical testing, the sand mould is certainly in good quality and the casting is of even quality. The castings reach uniform quality and durability after the factory utilizes the scientific annealing method. With stable quality and prolonged service life, the mould of jet soldering in fair price reach the same quality as those produced by foreign manufacturers.