This charcoal filter fits the Sport model S100 or Riccar SupraQuik RSQ1 portable canister vacuum. It is recommended you change out the filter every couple of months to keep your vacuum operating at peak efficiency. 

To change the filter on your Sport or SupraQuik RSQ1, release the metal clamp from underneath the vacuum, then pull off the front panel. Remove the bag, then remove the filter, which sits behind the bag. Put in the new filter, then put the bag back in, and lastly the front panel.