6" SPG FIXED UMBRELLA FLARED RIG BY GRAV LABS Stephen Peirce's influential designs have played an essential role at Grav. The Umbrella perc provides optimal diffusion for flawless smoothness, and the bubblers unique size ensures perfect flavor profiles. The neck is 90 degrees which keeps water from splashing up into your mouth. Design + function + precision air flow dynamics = the perfect rig. The set up also includes a domeless quartz nail.