This replacement brushroll fits Carpet Pro upright models CPU75 and CPU85, as well as the Fuller Brush FB75. The plastic roller measures 13.5" in length. The Shopify title lists 14" and the NS title lists 12" - the source description states 13.5" as the actual roller length; use 13.5" when confirming fitment. Replace when bristle strips are worn, frayed, or when carpet agitation performance has declined.