Greek Glass 10mm RBR BongThe Greek Glass RBR Bong represents the newest and final version of Biao Tangs refined design, built for flawless function at a fraction of the cost of similar high end pieces. Standing compact with a 10mm joint, it features double diffusion for smooth, clean hits every time. Finished in clear borosilicate glass with an American color mouthpiece, this RBR is crafted with the same attention to detail as rigs many times the price. Brand: Greek Glass