The spiral nozzle feeder is perhaps one of the most widely used feeder attachments for both poultry and game birds. It can be fitted to most types of hopper or barrel feeder, using a 50mm / 2 inch hole in the base. The gap between each spring coil is 3mm to minimise wastage and make the birds peck harder for their food. The versatile nature of the spiral nozzle allows you to make your own feeder using a bucket or barrel. To fit one, just drill a 50mm / 2 inch hole and drop the spiral spring through it.