China Ningbo Honger Tools Co., Ltd. Was founded in 1980, Which is a manufacturer of hardware tool assortment and rubber seal products, O-ring, o ring, oring. 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, O-rings, o rings, orings, metal o ring, national o ring, paintball o ring, o ring set, nitrile o ring, epdm o ring, standard o ring, buna o ring, neoprene o ring, faucet o ring are used in airproofing or connectting oil, Gas of auto, moto, Tractor, Ship, Machinery and so on.