York 10kg Bumper Grip Plate. For all you rubber lovers Inspired by the ‘ISO-Grip’ plate, the new ‘Bumper Grip’ plate embraces the manoeuvrability of the 3 grip design. The steel composite hub fortifies the integrity of the plate and the rim is surrounded by high quality rubber, ensuring the functionality and floor protection expected of a bumper plate. All "Bumper Grip" plates have the same standard diameter 5kg is cast aluminium, 10kg – 25kg are cast steel