14mm bowl

A 14mm bong slide (commonly called a bowl piece) is the standard removable attachment used to hold dry material on water pipes. Named for its exact joint diameter, the 14mm size is the most widely used industry standard, making it compatible with the majority of small-to-midsize bongs, rigs, and downstems.                                                                                                                                                                                                         A 14mm bong slide (commonly called a bowl piece) is the standard removable attachment used to hold dry material on water pipes. Named for its exact joint diameter, the 14mm size is the most widely used industry standard, making it compatible with the majority of small-to-midsize bongs, rigs, and downstems.