Bull Mineral FeederThese heavy duty, weather resistant feeders are built to handle rough use and each feature 3 separate mineral compartments. BMFHD, BMFHDFC Bull Mineral Feeders Prieferts Heavy Duty Bull Mineral Feeder is constructed from weather resistant black poly. This durable ground feeder includes three mineral compartments to provide expensive mineral supplements protection from the elements. The self closing rubber cover fits over the feeder to keep out rain,