Vacuflo Deluxe Bare Floor Universal Central Vacuum Attachment Kit w/35ft Hose Vacuflo offers a variety of attachment sets depending on your individual needs. The Universal Inlet Valve's low-voltage contact switches are inside the valve opening.The low-voltage connection is made when the low-voltage ring on the hose connects with the brass contact switches inside the inlet valve. If you are unsure of which tool kit to purchase, please call us at 800-221-8227. If you have genuine Vacuflo inlets, you must purchase a genuine Vacuflo Tool Kit not a Universal kit.