Tellurium copper ring core, brushed top and polished comfort interior.
Flat top with no inlay groove, perfect for ring makers wanting to customize the channel to any requirement. 2.3mm thick
6mm, 8mm total width comfort core interior options
No need to make the core from scratch, all that's required is a channel and a little finishing afterwards and these become custom cores.
Tellurium copper passivated for better corrosion resistance and sizes 4-17 available