The BUMPER COMPETITION discs are made of high density natural rubber (with a coefficient greater than 80°) which makes these discs extremely resistant to both wear and tear over time and to impacts: they are in fact designed to maintain their shape even after numerous and intense workouts or if subjected to falls from heights of 2 meters. The internal steel reinforcement also contributes to their resistance, giving them the desired weight and allowing the disc to slide smoothly along the barbell during loading and unloading. The bumper competition discs are available in the following sizes: 5-10-15-20-25 KG