If novon is written on the seller's section, a different and cheaper bracelet will be sent to you. the bracelet in the picture is completely made of 316l steel material. it does not tarnish. the inner diameter of the bracelet is 5x6cm. it is easily attached and detachable, it is a cuff model. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.