All you need to do is inset what needs pressing into a cylinder

You can even add more components or take some away to change the size of this pipe

The Mushroom Ashtray has a classic round shape and measures 4

They measure 1

If you need a spare or replacement glass downstem for your Tank Glass water pipe

LA Pipes Bubbler Pipe - The Glass Hammer Sherlock Style Bubbler All you need to doThe Glass Hammer by LA Pipes is a handheld bubbler thats the perfect combination of style and functionality. This 6 inch long masterpiece has been completely handmade in Los Angeles using high quality borosilicate glass. The Glass Hammer ensures youll enjoy a smooth smoking experience thanks to its unique water cooling design. This bubbler has a deep bowl, a built in carb hole for controlling the size and intensity of your hits, and a fixed downstem.