rectangular cover flang Size: from 1/2 to 200 inch (DN15-DN6000) ... , JIS, EN, JB, GB, HG, UNI, API CS,SS rectangular cover flang Technics: Forged Size: from 1/2 to 200 inch ... or Plywood Case Of Outside, Linoleum And Plastic Cloth Of Inside Dampproof, or other methods according to the requirements of our ...