***Disclaimer : Regular Disc Perc Downstem only compatible with Regular Beaker Base.*** An integrated part of the RöK Electric Dab Rig, the borosilicate glass downstem replacement part is available in case the original downstem was mishandled or neglected. This certified replacement downstem for the RöK Electric Dab Rig is made with durable borosilicate glass and features a disc style percolator. Note: The small size is equivalent to the original glass downstem that comes with the rig. These work in combination with the original small sized glass jar base. The large size works in combination with the upgraded large sized glass jar base. HIGHLIGHTS Replacement downstem for RöK Electric Dab Rig Borosilicate glass Disc style percolator Certified replacement item Exact fit