Precision-cast, strong, stylish collars. Developed for professional weightlifting competitions.IWF-certified.* Sleek design with generous 40 mm width, providing space for multiple discs on the bar.* Innovative lock leaver, making it easy to quickly add micro-weights outside of the collar when attempting records.Fast, strong and secure. Specifications- Weight: 5 kg- Length: 180 mm- Width: 180 mm- Height: 40 mm- Colour: Silver- Warranty: 2 year- Diameter of holes: 50 mm Certification Warranty terms and conditionsTo be dropped on 30 mm-thick rubber flooring (training platform recommended by Eleiko). Indoor use only. Normal wear and tear does not fall under warranty.