China Ningbo Honger Tools Co., Ltd. Was founded in 1980, Which is a manufacturer of hardware tool assortment and rubber seal products, tap refittin. Strictly practiced under ISO9001 quality control system. Products of rubber seal, O ring kit, hardware tool are all superior quality and reasonable price, Especially the O type seal assortment, Which take 90% of the total alike export products in the country. Our products, tap refittins are used in airproofing or connectting oil, Gas of auto, moto, Tractor, Ship, Machinery and so on.