Ridgid shop vac 2.5in hose to Ridgid planer 4-inch connector. Prints in 2 separate pieces to allow the lock on the end of the hose to lock on and prevent it from falling off when in use. I strongly recommend using a hose clamp to attach the pieces together and attach them to the planer port. I recommend printing in PETG if able so it stands up to the pressure from the hose clamp and daily use.