Vac U Lock Knuckle Up Color:Black or under rubber or neoprene

or under rubber or neoprene for a fuller basket

rubbing thoroughly into the tissue

just unscrew your shower head

Materials: Shaft- Silicone

Vac U Lock Knuckle Up Color:Black or under rubber or neopreneTaking hands on play to the next level, this feisty Knuckle Up accessory will delight and amaze you with its novelty, functionality, and its undeniable cool factor. The Knuckle Up accessory is compatible with the entire selection of Vac U Lock attachments, with its one size fits all knuckle rings sitting below a standard Vac U Lock plug. You wont believe how versatile this toy is! Its perfect for both masturbation and playing with a partner! What are