Sturdy and Durable: These barbell collars will not during use, hesitating to be made of stainless steel, this item has a life than many other collars on the market. Can perfectly your balance, coordination, flexibility and endurance. black plating finish among all chrome plating on the market. Widely : This product is designed to that you are safe during exercise. It is suitable for gyms, powerlifting, -fitting, weightlifting, etc. Just the Size: You will 8 pieces standard 1 inch (25 mm) spring collars, the spring clip can be firmly fixed on any 1 inch barbell or hex bar. read product and measure your weight bar purchase, make the bar is exactly 1 inch (25 mm) in diameter Non- Material: Plastic handle, environmentally friendly and safe to use. Colour:Silver + black Material:Stainless steel + plastic Size:Ring diameter: 25mm Package Contents: 8*Dumbbell Spring Collars Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.