These butt plugs are absolutely essential for those engaging in stimulating electro anal play. The simple design allows them to be affordable and versatile. It's bi-polar shape makes it easier to use: just plug in and play. It comes in 2 sizes: a small 3" long, 1" wide and a large 6" long and 1.5" wide. The silicone texture makes it great for those with allergies to latex. Not only that, these butt plugs feel warm to the touch, are resilient and durable. They clean very easily and are very cool to have in one's repertoire of anal play. It works well with our VF170 Deluxe Digital power box.