Ribbed for your anal pleasure, this hollow butt plug is available in 3 sizes so that you get the fit that is just right! 
Meanwhile, the tunnel in the core allows you to insert an anal-safe vibrator, a liquid of your choosing, and more! You can even give your partner a peek inside.
 
Measurements: 2.7 inches in total length, 2.25 inches insertable length, 1.75 inches in diameter. Hole is .8 inches in diameter.