Tantus Silicone Large Ripple Butt Plug, The Large Ripple by Tantus is a combination of anal beads/dildo. It fits a harness perfectly for a slow sensual seduction. The beads start at 7/8 in. diameter and build gradually to 1.5, which makes for a tantalizing ride for both vaginal and anal play.

https://www.youtube.com/watch?v=kRnz5WkKs6g