The Rocks-Off Ass Berries Blackberry. The second in the Ass-Berries range is this slightly larger girthed butt plug. Still ideal for both beginners and the more experienced butt plug user. Made from IntraMed hypoallergenic material and powered by the award winning RO-80mm Bullet vibe, which is removable for extra play and makes it easy to clean. Tapered at one end and covered in sensational feeling individual bumps, slightly slimmer in the middle and black in color. Powered By: RO-80mm. Size: 95mm x 35mm x 35mm. Battery Type: 1.5Volt N size / LR1. Battery Quantity: 1. Waterproof: Yes. Speed: 1.