Limited Edition Double Drum Perc Saxo BongGrace Glass Limited Edition Double Drum Perc Saxo Bong The Grace Glass Double Drum Perc Saxo Bong stands 29cm in height and is made from 5mm thick glass. The piece is equipped with double drum diffusers which cool everything down, break up smoke and help to remove particulates and carcinogens from the hit. The smoke is filtered twice once by the inline drum in the lower chamber and then again by the second drum perc in the top chamber. As well as