... , 4.MATERIAL:SS304/316 DN40 SS304 SQUARE PLUG (SQ)1.The SQUARE PLUGS are designed and manufactured2.according to international standards3 ... B2.1 , BS21, DIN259/2999, JIS B0203Application industriesFor use in the Pulp and Paper,Water Treatment,Sewage Treatment,Chemical,Biotech,Pharmace ... ,Food ,Mining,Architectural,Trang Portation etc.PackingTray or Wooden Cases,under the client's request.