The 10mm Inline Donut Rigs by Darby Holm for DC Glass. These mini diffused oil rigs feature a stemless water chamber with a fixed multi-hole inline base perc and a fixed donut splash guard with a 10mm reinforced female joint. Each rig is unique with its own set of custom DC decals and sits sturdy on a flared base. The size and function of these rigs are ideal for dabbing and pair well with your favorite quartz banger or electric nail setup. This quality, diffused oil rigs are handblown from boro glass in Southern Oregon.