RooR Zumo 4.2mm

This is by far the largest roor bong ever produced with a massive internal diameter which is brought in at the mouthpiece. The downstem ships as a 18.8 and a 29.2 ground joint size. The 29.2 joint size is genuinely HUGE allowing for a full "chug" through with minimal drag. For those wanting to use their 18.8 bowls with this larger joint size you can purchase a 29.2 to 18.8 convertor. A bright vivid orange label sets this beast apart and it is made from 4.2mm glass. Complete with a bistabil joint and huge base for stabillity.