Material:The barbell spinlock collars are made of high quality iron material, chrome plated, durable and corrosion resistant and can be used for a long time.<br> Size: The anti-slip collar of the barbell is suitable for 25mm standard barbells or dumbbells. Please check the size before purchasing.<br> ANTI SLIP DESIGN： The barbell clamp is equipped with a non-slip rubber ring, ensuring it can be securely and securely attached to the barbell or barbell bar.<br> Package Content: 4 Pcs x Dumbbell Spinlock CollarsApplication: Perfect for use with bumper plates and lifting platforms. Also a practical and perfect gift for fitness lovers.<br> Specification:<br> Material: iron with chrome plated material<br> Size: 1 inch 25 mm.<br> Colour: silver.<br> Package includes:4 x dumbbell spinlock collars.<br> Please note: due to manual measurement, there may be a 0-2 mm error.The colours shown in the picture may not fully match the actual object due to the recording method and display device.<br> Please make sure you do not mind before you buy, thank you<br> Guaranteed:We are committed to providing you with the best service.If you encounter any problem during your usage experience, please contact us without hesitation.