Navy rubber strap, 18mm width, model number S181370. With gold buckle. - Color: Navy - Material: Rubber - Size: 18mm - Buckle: Gold buckle Thank you for viewing. I haven't used it since I bought it because the watch broke. It's new, but please understand that it has been in someone's hands before purchasing. The paper case it came in when purchased was put in at the store, and the clasp is bent because I took the contents out this time. Please understand that the paper case is only included to protect the contents during delivery. Thank you very much. ※Gray is also available.