1 Gallon Plastic Screw-On Poultry Waterer Base

Screw-on base combines with the Little Giant 1-Gallon Screw-On Waterer Jar (Item No. 666, sold separately) to make a gravity-feed waterer. 9 inch diameter by 1.5 inch high. Made of heavy-duty polystyrene.
 
Screw-on waterer base
Fits the Little Giant 1-Gallon Screw-On Waterer Jar (sold separately)
Combines with waterer jar to make a gravity-feed waterer
1-gallon capacity when combined with waterer jar