This filter kit is made for the Riccar 8925 or any 8000 upright that does not have onboard attachments.  The electrostatic 3M post filter is made to fit any 8000 machine with a “U” shaped filter cover.  The pre-motor filter is a bit larger and is designed for machines that do not have on-board attachments.  
 
If you’re unsure if these are the right filters for your machine, please reach out to us.