Disc true with weight 2.5 kilograms and internal diameter Φ50 millimeters, from Tunturi. The diameter is Olympic type, which means it fits Olympic bars, which are usually used by athletes lifting more weight, always having the same level of safety and comfort.

Bumper discs are Olympic-sized weight plates (Φ50), made from high-density rubber or urethane. They are ideal for weightlifting, CrossFit, and High Intensity Functional Training. They are specifically designed to withstand free fall from a great height (even above the head), absorbing shocks. This protects the bar from bending, the floor from breaking, and the discs themselves from damage. Regardless of their weight (whether they are 5, 10, 15, 20, or 25 kilograms), they all have the exact same external diameter (45 centimeters), so the weight is evenly distributed upon impact with the ground. It is made of rubber so it does not make noise when in contact with the floor, while also protecting it from damage. Also, the rubber cover prevents the disc from rusting over time.