Vacuum attachment lets you connect a vacuum to the Af-C machine to collect tuning debris. NEW version only fits machines produced after approximately 2022. Verify if your machine has open unused threaded holes in the two handles. If so This is the correct vac attachment. If you have no threaded holes in your handles, then use OLD version vac attachment. See 2nd picture to see visual of thread holes needed to use NEW version vac attachment.
For safety only to be used with water filtration vacuums or specific vacuums designed for hot ashes and recommended to remove filter and add water to your vac canister.