316 Stainless steel 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. 2.6mm thick and 8mm total width comfort core interior
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.
316 Stainless steel and sizes 4-17 available