The adjustment rings are mounted onto the goali-rod and are needed so that the goalie can not stand next to the goal.
This adjusting ring is suitable for all foosball tables with 16mm solid or hollow rods and is mounted on the goalie rod.
The Lettner adjusting ring makes sure that the goalkeeper can not go past the goal. It fits for all 16mm rods.
The white PVC adjusting ring suits for all 16mm rods and is delivered with the fitting screw and nut.
The Leonhart adjusting ring for all 16mm bars prevents the goal-keeper from going next to the goal.