Oxballs Buttballs Asslock and Cock sling Silicone -TPR Blend Black. It takes balls. Butt Balls asslock with built in cock sling from Oxballs. If you are a fan of our Ass-X or Tail Pipe asslock, you are going to love our newest model, Buttballs. You asked for it and we delivered. Buttballs is our new FlexTPR asslock with a textured butt plug for an even more intense ass workout. The dual sensation of the built in cock sling gripping your junk and the beaded pucker stuffer stretching you from the inside will have your rock hard hog dripping. Stats approximate entire length 15 inches, length between sling and plug 6 inches. Butt plug length 8.5 inches. Usable circumference 4.5 inches. Weight 6.5 ounces.