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.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. Tips for clasp locking loosely: it's friendly design for easily open, please visit our V-Clasp version if need totally closed version. Tips for avoiding scratches: put some tape or oil on lug when installing. Item number: SS221823B135Full compatible model list: Compatible with Seiko 5 2019 new Sports re-born SRPD models SRPD51, SRPD53, SRPD55, SRPD57, SRPD59, SRPD61, SRPD63, SRPD67, SRPD69, SRPD71, SRPD73, SRPD75, SRPD76, SRPD77, Black models SRPD65, SRPD79, SRPD81, SRPD83 SRPD85 and SBSA005, Automatic Gold SRPE74, Mini Gundam SRPF91K, SBSA031, more same curve models SBSA145, SPRE75, SPRE77, SPRE79, SRPD87, SRPD91, SRPD93, SRPD95, SRPG61, SRPH80 and SRPJ19J8Introduction: This Rollball version II watch band with curved solid end pieces is compatible with Seiko 5 Sports 2019 re-born SRPD Series: SRPD51, SRPD53, SRPD55, SRPD57, etc. The idea of "Rollball" Rally metal watch band was inspired by a famous game - rolling a ball over a "ball-hop" hump that jumps the ball into rings and anchored. Brand: MiLTATStyle Name: Rollball version IILug width (mm): 22Buckle size (mm): 18Thickness (mm): 3.3Spring bar hole dia. (mm): 2.50Material: 316L Stainless SteelColor / Finish: BrushedMax. length (mm): approx. 186Min. length (mm): approx. 123Net Weight (gram): approx. 84Lug end style: Curved EndAdjustment type: 6 Screw fixed links & 4 micro holes on clasp