We call this one the trainer plug because it is a good medium size to really start training someones asshole to stay open. Hopefully what this would result in is an asshole that was open enough to take cock easily, yet well trained enough in its grip to juice the cock when the time was right.
Solid Stainless Steel
4.25 inches overall length
1.375 inches diameter at widest point
0.75 inches diameter at neck.