The 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 surround measures 4 ½" x 19 5/8" 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.