With a large diameter of 20cm this seed tray is dual purpose it will catch feed that is dislodged from feeders preventing waste and spillage while at the same time it is large enough for the birds to feed from it filled with mealworm or other tasty treats it is an ideal way of supplementing their dietr r heavy duty it is made from dark green rust and weather proof metal with drainage holes to expel rainwater and it comes with a screw to attach it to the base of any of our premier seed or