Yongkang St. Chang Co. remind everyone to buy stainless steel security door security level to note: Stainless steel security door security is divided into A, B, C3 level. C-level security for maximum performance, followed by Class B, A-level minimum, the market is more for A-grade stainless steel copper door handle, generally applicable to ordinary families. A-level requirements: All steel, flat open fully enclosed, general machinery, hand tools and portable power tools complement each other under the action of its weakest link can resist abnormal open net time ≥15 minutes stainless steel copper doorknobs, or should not be Cutting through the door of a 615 square centimeters of the hole. St. Chang Industry and Trade to teach you how to identify the quality of stainless steel security door fastest way: 2, grade specifications: Shanxi security door security level state designated as Class A, Class B and Class C, Class D, during the highest grade security features A, Class B, Class C Second, the lowest level D grade. We saw in the furniture stores are basically Class C, Class D Tongmen wholesale stainless steel security door, usually relatively suitable family use. Stainless steel security door process Yongkang St. Chang Co. produced exquisite stainless steel bronze doors, reliable quality, competitive price, welcome customers and friends to buy. Stainless steel copper door fittings, Zhejiang stainless steel bronze doors of St. Chang Trade and Industry provided by the quality and quantity of St. Chang Ltd. Yongkang. Yongkang St. Chang Ltd. (www.shengchangco.com/about/) strong, credible, Jinhua in Zhejiang housewares industry has accumulated a large inventory of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the St. Chang Industry and Trade into the brilliant and you work for a better future!