Collars are a quick and easy way to move your plates. They also hold weight plates securely while lifting. For long-lasting use. 100% brand new and high quality. Easy and quick to remove, safe and secure to provide balance and stability. The map grooves are random, and random colors cannot be selected. Ideal for chest and arm exercises. color:black Material: plastic size: 25mm Package Included: 4 Dumbbell Hex Nuts Only the above package contents, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.