The Improved Mann Lake Top Feeder comes completely assembled and ready to use. Holds up to 4 gallons of syrup and features a galvanized steel safety screen to prevent drowning of bees! This feeder is constructed of a heavy-duty, single piece plastic to provide a no-leak reservoir! Wooden surrounding measures 4½" x 19?" (11.43 cm x 49.85 cm) and fits all standard 10 frame equipment. There is no comparison to the strength and durability this feeder provides over foam top-feeders. Fits 10 Frame equipment.