GRAV Labs 8" Wide Base - ClearThis GRAV� Straight-Based Water Pipe is 8" tall and made on 32mm tubing. Its downstem ends in a broad orb perc that diffuses smoke through water and is fixed inside the pipe to prevent damage. The tiered body keeps water from splashing out of the piece. The straight-based water pipe comes ready to use with a 14mm GRAV� Cup Bowl and functions best with approximately 1.5" of water