The seams on our rings are the best in the industry. We have developed a method of production and finish to achieve seams that meet perfectly flush with no gaps, nicks, dents, or rounded ends. An absolute pleasure to work with as they insert with ease following a taper or even just on its own. And yes, we call them 'seamless', you will too when you see them. These are measured by wire thickness and inside diameter across the ring. Wholesale available.