CBR Bumper HMS Olympic Plate, covered with top quality rubber. Its main advantages include perfect cast, aesthetic finish and special profile to prevent spinning on the griffin. The plates were made of top quality materials. Covered with a special thick rubber, absorbing each impact – so that it does not destroy the substrate during the fall. The HMS CBR plates reach 75 to 96 Shore scores depending on the weight. This means that these plates achieve much more durability than for cheaper, rubberized plates available on the market. Each plate is calibrated by weight and dimension. This means that the disk weight must be within +0.5 % and -0.5 %. The colour of the plates assigned to each weight complies with the technical requirements of the IWF, the International Weight Lifting Union. The inner diameter was matched to the Olympic Griffins. The precise execution ensures weight stability during intensive training. The sleeve in the plate is made of stainless steel – this makes it easier to put on and remove loads from the barbell. Additionally, it is an element that keeps the load stable on the griffin. Specification: Material: stainless steel coated with rubber External diameter: 450 mm Internal hole diameter: 50.6 mm Weight – colour – thickness: CBR05 – 5 kg – grey – 26 mm CBR10 – 10 kg – green – 46 mm CBR15 – 15 kg – yellow – 63 mm CBR20 – 20 kg – blue – 72 mm CBR25 – 25 kg – red – 84 mm