Pure Titanium ring core for insert. Brushes surface with rounded polished comfort fit inside. The edge thickness is around 1.2-1.3mm,ready for wood crafts working or other DIY handcrafts works. The popular ring width is 2mm/4mm/6mm/8mm. Those dimensions can be customized if you can meet minimum order quantity for production.  
There are available samples here which you can take to test.  
Small order is acceptable if we have them in stock.  
Please feel free to contact us to check the stock list.