Body Circle Niobium Super Soft Seam Rings. They are all made from 99.95% pure ASTMB392-18 niobium -- the purest available. They are ultra soft, handcrafted & hand polished to a mirror finish just for you in our shop in Tukwila Washington. Our rings have nice clean tight seam that is almost unnoticeable. They are perfect for just about any piercing.