The replacement hookah glass water base is for the Small size Hookahs. These glass hookah bases feature an inverted shaft and base combination, where the shaft fits over the outside edges of the glass base. The diameter of the top opening on these bases is about 1.5 inches and will include a small base grommet. These bases will only fit the small hookahs. you can get blue color, red color and black color with other hookah accessories in our store at best discount prices.