<Table> Five cents <Tr> <Td_colspan="2"> Australia </Td> </Tr> <Tr> <Th> Value </Th> <Td> 0.05 AUD </Td> </Tr> <Tr> <Th> Mass </Th> <Td> 2.83 g </Td> </Tr> <Tr> <Th> Diameter </Th> <Td> 19.41 mm </Td> </Tr> <Tr> <Th> Thickness </Th> <Td> 1.30 mm </Td> </Tr> <Tr> <Th> Edge </Th> <Td> Reeded </Td> </Tr> <Tr> <Th> Composition </Th> <Td> 75% Copper, 25% Nickel </Td> </Tr> <Tr> <Th> Years of minting </Th> <Td> 1966--present </Td> </Tr> <Tr> <Th> Catalog number </Th> <Td> KM #80 </Td> </Tr> <Tr> <Th_colspan="2"> Obverse </Th> </Tr> <Tr> <Th> Design </Th> <Td> Queen Elizabeth II, Australia's Queen </Td> </Tr> <Tr> <Th> Designer </Th> <Td> Ian Rank - Broadley </Td> </Tr> <Tr> <Th> Design date </Th> <Td> 1999 </Td> </Tr> <Tr> <Th_colspan="2"> Reverse </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Design </Th> <Td> Echidna </Td> </Tr> <Tr> <Th> Designer </Th> <Td> Stuart Devlin </Td> </Tr> <Tr> <Th> Design date </Th> <Td> 1966 </Td> </Tr> </Table> <Tr> <Td_colspan="2"> Australia </Td> </Tr>

What are australian 5 cent coins made of
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