this ad features a cone shaped glass slide head piece bowl for your hookah, water pipe that is over-all about 3" long and has a 14mm joint size with a grip feature. The actual bowl part of the slide is a deep cone shape and 3/4" in diameter at the top surface and about 1" depth.
This item is a hand made glass art item (vs. exact machine made duplicate) and as such will vary in exact size, color and features (but will always fit a 14mm joint).
Good quality glass construction and good looking. A great gift for yourself or your friends.