The ring liner features a comfortable radiused interior profile that won’t pinch when doing everyday tasks. Made of solid stainless steel, the liner is hypoallergenic, rust-resistant and very durable. The shell of the ring can be made with exotic wood, Spectraply (colors A & B - See images presented as a product) or stabilized wood. You can refer to the following webpage for more details : https://www.creativewooddesign.ca/portfolio-items/wooden-rings/#ring-blanks. They are available in 5 and 8 mm wide.