Material adjusting weight: aluminium (1 mg - 5 mg) / german silver (10 mg - 500 mg) Material box (available as an option): Wood Note: If weights are shipped without a protective box, it is highly likely that the weights will be damaged. This damage may mean the weights exceed the permissible error limits. In the worst case, this may render your weights unusable. We can therefore provide you with the appropriate boxes for protection and storage, which prevent damage and will allow you to store your weights securely throughout their service life. However, should you still wish to have your weights shipped without such a protective box, then you must confirm this to KERN in writing.