Boredom breaker or slow feeder which is great for reducing intake whilst occupying the diet restricted horse. It will stop hay blowing around the field or getting muddy and the conical shape rolls in a circle, not under a hedge or fence. Very easy filling through the funnel-shaped opening. Can also double as a pole block. Made from exceptionally durable stubbythene. Hole size is 5cm, feeder hole is 25cm and overall length is 62cm.