THE RING - This particular ring boasts a contemporary flat band, slight comfort fit and a matte finish. The matte finish is extremely durable and scratch resistant. Made with pure 100% unidirectional carbon fiber. There is an opening/ cutout on the top of the ring. Ring pictured as an 8mm band width. Since each ring is individually handcrafted, there might be slight differences in each ring giving you a one of a kind piece. PROPRIETARY NASA TECHNOLOGY IN EVERY RING - Having decades of experience with carbon fiber and composites, we invented a unique process for NASA that we use in every Core Carbon Ring made. The process allows for an extremely strong, lightweight, comfortable, and truly unique ring. HANDCRAFTED IN THE UNITED STATES - Each ring is professionally and individually handcrafted on the Space Coast of Florida. SATISFACTION GUARANTEE - We want you to be completely satisfied with your new ring. If you are not for any reason, please contact us. We will be happy to exchange until the ring is a perfect fit or refund you for your order.