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Vac U LockStrap On Dildos & Vac U Lock Harnesses from Doc Johnson. Their patented Vac U Lock system includes a wide range of Vac U Lock attachments and Strap On Harnesses to fit up to a 44-inch waist, with some now fitting a 69-inch waist. With all items now being phthalate-free, the universal harness system is perfect for those that like the ability to interchange their toys.

Vac-U-Lock System