Kirby Universal Fit HEPA vacuum bag is designed to fit all Kirby vacuums from the Heritage II thru the Sentria and Sentria II Kirby vacuums, including the G10 and G10D.  The bag has both the twist and F-Style mounting.  These bags are designed to supercede the F-Style bags which are no longer available.  These bags are available in a 2-pack or 6-pack.