The Heraeus CombiBar™ is available in three sizes: 20, 50 or 100 individual 1 g minted gold bars are joint together to form one large bar. The single 1 g bars can easily be separated from one another. Only the large bar carries a serial number. The CombiBar™ comes in a plastic case that also contains the certificate. The purity is the same as for all Heraeus gold bars: 999.9.