... .6,5.8,6.8,8.8,10.9,12.9 ( General and High strength) >> Surface treatment: plain, black, zinc, electro ... galvanize, hot dipgalvanization, Dacrotized and so on. >> We can manufacture the followings: Our strength on ... U.S.A., Canada, Cuba, Germany, Japan, Singapore, Malaysia and Africa and so on. Pictures: 1. Certificate: 2. Various honorary certificates: ...