For use with National or Commercial hive. This feeder will stop all those trips back and forth, topping up the feed for your honey bees. It Will hold when full 3.5 gallons of syrup, clearly marked on the inside for more accurate feeding, has two feed holes which are ribbed inside and out to give the bees good grip and to minimise bee losses. The feeder sits on to of your crownboard, it doesn't need an eke, or empty super as its specially designed - the roof just fits directly on top. Made from food grade, UV and frost resistant plastic, it will last for years in our usual British weather too!!