Though they have a simple design and shape, the Black Duo Balls by Trinity Vibes give you effective and amazing internal stimulation. Inserting and removing is easy as both beads have a smooth exterior and are connected to each other by a sturdy nylon string. The secret to these beads comes after you insert them, as you will start to feel vibrations as you move around. These vibrations are caused by two additional balls located inside each of the black balls. When you move, you will cause the balls to roll around, creating vibrations. When done, you can remove them by pulling on the nylon string loop located at the end. 

Similar to the Purple Vaginal Beads, Black Duo Balls don't use padded internal balls so the vibrations are stronger and a little louder.

Material: ABS Plastic. 

Measurements: Each Bead is approx. 4.38 inches in circumference and approx. 4.25 inches in length when attached. 

Packaging: This item does not come in a retail box.  Comes in a plastic bag.