The item for sale is a brand new, aftermarket replacement, Top Quality silicone rubber diver strap for Citizen Watch 59-S51866 Eco Promaste in curved end for 23mm lug opening in Black color. It will fit the following models: BJ2110, BJ2111, BJ2117-01E BJ2118, BJ2119, BN0088 BJ2110, BJ2115, BJ2117 ,BN0085 , B740-S067201, 59-S51986, B740-S064023, B741-s066450, E168-S070830, BN0085-01e, BJ2115-07E, 5070830, E168-S070830 . 13cm (5 1/8inch) longer side 8. 5cm (3. 3/8 inch) smaller side Width at Strap: 23mm Width at buckle: 20mm No logo or markings on the straps. Customers have commented that our straps are softer and better than the original, the best quality online. You will receive complete set of Top Quality Ruber Strap with Stainless Steel buckle and it comes with 2 free spring bars. **_All Customers Please Read The Following Before Purchasing:_** Be sure to check our detailed measurement guide below or in the photos/images section of the listing to assist you with purchasing the correct parts for the watch. The guide will show you how to measure the lug width opening of the watch using a ruler, how to check the model number, and assist you with other questions you may have regarding measurement. Watches may share a visual resemblance, yet variations in case size or year model can distinguish them. This will help to avoid any returns or exchanges. We are also an email away to assist with any questions you may have. Thank you for the business! **_100%