Zilco fillis iron & rubber 4 3/4 stirrup

This style of stirrup may also be referred to as a German or Heavy Dressage Iron, or Knife Edge Iron. It is similar to the regular 2 bar stirrup, but has a much heavier base and tall, streamlined sides. The extra weight makes it particularly popular/suited for Dressage, where the stirrups should be as still as possible, but it is also suited to other types of competition riding.