The RooR Glass Custom 7mm Beaker Bongs featuring Custom Opal Crowns. These Bongs are made from 50mm x 7mm premium German Schott Duran Pyrex tubing featuring authentic Platinum RooR label. These durable and reliable water pipes have a removable 14/18mm open-end downstem for smooth classic diffusion that requires a low level of water in the chamber. The straight neck features three ice pinches if you choose to cool your smoke. Each piece has a Custom Crown with Nine Opal's and matching Opal handle bong slide.