Tantus Vibrating C-Ring 2 in. Onyx (Bag)Equipped with a removable vibe this 2 inch c ring with a buzz is sure to please both parties and for anal sex the vibration plays on all those nerve endings in the sphincter. To put on lube the inside of the ring and pull one testicle through then the other before pulling your penis through. For solo play the best placement for the vibe is under the testicles so the vibrating portion of the ring plays on the perineum. Dimensions Total Length: 2. 5in