Upper section of the Hayden extension tube will fit with both newer and older style Hayden wand systems. 17 1/2-inch metal wand. Plastic channel measures 3/4-inch. Top button hole starts 3/8 inch down and button nipple starts 1 5/16 inch up from the bottom. (Also fits Kenmore PowerMate Sears #4148753 Wand and cord mount assembly, and some AirVac VM 454.)