Grav Arc line Series Water Pipe The Grav Arc line Hemisphere Bubbler is 6" tall and made on 28mm tubing. Its fission down stem diffuses smoke through water and is fixed inside the pipe to prevent breakage. The beautiful flame polished Grav label conforms with the Arc line style, inspired by Tuscan columns from ancient Italy. The Arc line Hemisphere Bubbler comes ready to use with a 14mm Arc line Bowl and functions best with approximately 1" of water. Grav Water Pipe Features: Length Height: 6" Joint: 14mm Female Use With: Dry Herb Comes With: 14mm Arc line Bowl Designed By: Stephan Peirce What's in the Box: 1x - 6" Arc line Hemisphere Bubbler by Grav 1x - 14mm Arc line Bowl