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. Size: The anti slip collar of the barbell is suitable for 25mm standard barbells or dumbbells. Please check the size before purchasing. 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. Package Content: 4 Pcs x Dumbbell Spinlock Collars Application: Perfect for use with bumper plates and lifting platforms. Also a practical and perfect gift for fitness lovers.Produktbeschreibung Specification: Material: iron with chrome plated material Size: 1 inch 25 mm. Colour: silver. Package includes:4 x dumbbell spinlock collars. Please note: due to manual measurement, there may be a 0 to 2 mm error.The colours shown in the picture may not fully match the actual object due to the recording method and display device. Please make sure you do not mind before you buy, thank youGuaranteed:We are committed to providing you with the best service. If you encounter any problem during your usage experience, please without hesitation.