Aqua Pure(TM) 68900-33 Housing Wrench Fits Aqua Pure(TM) AP800 series housings. Approximately 6.25"" wide. Intended for heavy duty use. AirFilters.com The Aqua Pure(TM) 68900-33 Housing Wrench is designed for Aqua Pure(TM) AP800 series housings. It is approximately 6.25"" wide and intended for heavy duty use. Purchase one today!