The Little Giant 1 Quart Jar Metal Feeder Base screws onto a Little Giant 1-Quart Plastic Screw-On Feeder/Waterer Jar (Item No. 690, sold separately) or a standard Mason jar to make a gravity feeder. Made of heavy-gauge galvanized steel for years of service. Rounded, embossed edges help reduce chafing on chicks' neck and head. Eight feeding holes. 6 inch diameter by 2.5 inch high.