Iae F030 2000 03 - Heavy Duty Circular Ring Feeder. Price is one one ring feeder. The Heavy Duty Circular Ring Feeder is manufactured in two sections bolted together. 2135mm diameter x 1450mm high x 670mm deep welded base. 38.1mm x 38.1mm SHS horizontal rails. 35mm o/d tube vertical rails at 335mm approx centres.