The Minuteman 529123 Lid Assembly includes:

ULPA Filter PN 110029
Prefilter Sleeve PN 110030

The replacement filters Vacline offers are:

ULPA Filter: see 6286H7
Prefilter Sleeve: see 6286S1

Note: Minuteman discontinued the HEPA Filter PN 110004 for this vacuum and replaced it with the ULPA filter.