This micro scientific Oil Rig is a nice side car water bubbler. Features: Inline Down stem is high crafted glass . No need for a downstem, as it is built in-line with the water pipe. Ring accents or glass marias for cool aesthetics. Lots of precision to manufacture; in fact, a micro can take longer to blow than an exact larger 18" pipe due to the precision involved. 14mm male glass on glass joint. Includes 14mm Nail and Dome.