Read more Precise Weight - The maximum deviation is about 0.3%, allowing you to keep your training balance! Our weight plate is made of 100% pure natural rubber, so there is no that the weight of the two pieces is exactly the same. A slight deviation is normal. Advantage - Compared with the mixture of cast iron and sandstone, rubber is very durable, and the noise generated by falling to the ground is relatively small, and the damage to the ground is small. If you are using it in a home gym, then rubber material is your best choice! Size - The diameter of 10lb and 25lb is the same, about 17.5 inches, the barbell bar is stably erected for easy deadlift. When you are doing bigger weight training, the weight plate of the same diameter can bear the weight evenly and avoid bending! Read more Rubber - The noise produced when falling is small, it is durable, has little destructive power to the ground, and has low bounce! Cast iron - High durability, but falling will cause greater damage to the ground and generate greater noise! Sand and stone mixture - It is easy to cause the internal filling to break when it is dropped, and the external plastic is easy to crack, resulting in the exposure of the internal filling, poor durability, damage to the ground and greater noise！ Read more 25LB Weight Plates 10LB Weight Plates Yellow Deadlift Wedge Loading and unloading Plates Red Deadlift Wedge Loading and unloading Plates