The address of BAL on Ethereum main net is 0xba100000625a3754423978a60c9317c58a424e3D.
https://etherscan.io/address/0xba100000625a3754423978a60c9317c58a424e3D
The address of BAL on Polygon is
0x9a71012b13ca4d3d0cdc72a177df3ef03b0e76a3
https://polygonscan.com/address/0x9a71012b13ca4d3d0cdc72a177df3ef03b0e76a3