... x 4, etc. 2) Bearing Bar Pitch (center to center)12.5, 15,25, 30, 30.16, 32.5, 34, 40 ... are recommended,America standard is available. 4) Material:Mild Steel (Low Carbon Steel) or Stainless Steel 5) Surface Treatment:Untreated, Painting ... FairPlease contatc: kevinYou will get what you want! steel grating for Power plants Sewage treatment Municipal engineering