What, no bowl for your Gravitron? That will never do, so if you're in need of a replacement, here it is. You can believe since this is a Grav Labs product there will be absolutely no difference between this replacement part, and the original that came with your Bong. In the world of smoking accessories, this is a name you can actually put your trust in. Some people are better at losing things than others, or maybe a little more accident prone than most. If you happen to fit either category, that's no problem because at this price, you can afford to keep a few extra's around, and never have to go without a bowl again while you're waiting on the mail.