Grate - 12, SVCE (OG54,OG42)
  NOTE:   This Cylindrical Grate Also Replaces
          814540 Hex Grate Which is NLA.
  OG30    Uses Two 13" Grates
  OG36    Uses Three 11" Grates
  OG42    Uses One 12" and Two 13" Grates
  OG54    Uses Two 12" and Two 13" Grates