Diffuser,Fre Lower LT SVCE
    632   Use Regardless of Serial Number.
    642   Use Prior to Serial #1810000.  Starting
          with Serial #1810000 see 7018116.
    632-2 Use Regardless of Serial Number.
  BI-36U  Use Regardless of Serial Number.
  BI-36UG Use Regardless of Serial Number.
  BI-30U  Use Regardless of Serial Number.
  BI-30UG Use Regardless of Serial Number.
  BI-42SD Use Regardless of Serial Number.
  BI-48SD Use Regardless of Serial Number.
 BI-48UFD Use Regardless of Serial Number.