Chest weight made of stainless steel (1.4021), weight: 50g. The base and cover are made of chrome-plated aluminum (3.6026), additional weight: 20g. The base and the weight are screwed together with a galvanized eye, additional weight: 10g. The chest wedge is made of galvanized metal sheet and covered with rubber for extra comfort, additional weight: 4g. All components are nickel-free. Cleaning: Use disinfectant for cleaning.