Strapcode Guarantee: Upon receiving our goods, If you are having problems with the fitting with our products or other issues, please feel free to contact us. As experience, 99% cases could be fixed. 1. Tips for not fit: use smaller spring bar. Plz contact our team to request for a set of different sized spring bars to rectify the matter. 2. Tips for clasp locking loosely: it's friendly design for easily open, please visit our V-Clasp version if need totally closed version. 3. Tips for avoiding scratches: put some tape or oil on lug when installing. Item no. : XLXH1C-A-21A20BRU Full compatible model list: Compatible with Longines Hydroconquest/Conquest 41mm automatic watches, HydroConquest 41mm automatic eg.L3.742.4.56.6 and Conquest 41mm automatic L3.777.4.99.0 from 2022 or before, and including its variants Brand Name: StrapXPro Lug width: 21mm Buckle size: 20mm Buckle Include: Yes Buckle type / Finish: Brushed Stainless Steel Pin Type Buckle Overall Length (not including buckle): 130mm + 85mm Thickness: Approx. 3.2mm - 2.8mm Spring bar hole dia.: 1.78mm (Quick Release included) Material: Premium vulcanized FKM rubber (Resistant to Sweat, Dust, UV, and Odorless) Color / Finish: Black Lug end style: Curved End