U-Cups® Pin size:1" Compatible with most racks and

Compatible with most racks and barbells

Type 6 adapts 3x3 U-Cups onto 2 1/2" x 2 1/2" racks (1/4" side gap fill

From source materials to manufacturing

filed the patent

U-Cups® Pin size:1" Compatible with most racks andStay focused on your calves U Cups were designed to prevent tipping backward while doing standing barbell calf raises. The U shaped chamber contains the barbell which allows you to focus 100% on your mind muscle connection until failure. Build calf muscle faster Research shows free weight exercises require greater muscle fiber recruitment to stabilize the load. Rated to handle over 1000 lbs, using U Cups will challenge your calves in a whole new way.