8-1/2" black crevice tool fits on Hoover canisters which use attachments with a pin on the connector which fits INSIDE the hoses or wands. It is not for use on Hoover uprights nor Hoover Bagless canisters since their attachments fit OVER the wands.
Check the "Fits These Models" tab to see which models this crevice tool works with. Don't see your model listed? Please call Customer Support for help with parts that fit your model.