Our high-elastic barbell plates are made of virgin rubber and are thicker than ordinary rubber. These plates are used professionally for barbell athletic training. They are silent when dropped and do not damage the floor. These barbells are highly elastic, waterproof, and wear-resistant. These plates have undergone a rigorous drop test and were able to be dropped 20,000 times from a standard height without deformation or damage. There are a total of 5 easily distinguishable colors to choose from, with each color representing a different weight.