The nesting-style jug design of the Miller Mfg Poultry Fountain makes attachment to the base easy, while the low profile enhances stability of the waterer. Fits the Little Giant 1-Gallon Nesting Waterer Base (Item No. 51518, 51519 sold separately). Jar is molded from durable transparent polyethylene so the water level is always visible. 8 inch diameter by 7.5 inch high.