The spring feeder holds approximately 35kg of feed (more than a complete typical feed sack full). The body is a plastic drum with a metal spiral spring at the base. Feed is delivered in response to the poultry pecking at the spring. 2"x 2" legs are counter-bored and drilled at precisely the correct angle to maintain strength and stability in adverse weather conditions and are tanalised timber for long life. All nuts and bolts are zinc plated.