Ningbo Spark Coupling Co., Ltd. is a major supplier and exporter of Hose Couplings and fittings in Ningbo, China. We are specialized in the production of Camlock Couplings, Air Hose Couplings, Guillemin Couplings, Double Bolt Clamp, Spiral Clamp & Superior Clamp etc. Highest quality, complete supply chain, convenient transportation endue us with advantages in the market. Our products are enjoying a high reputation in US, EU, Asia and Australia in the oil, mining, agriculture, food,...