Specially designed for Polar M400 / Polar M430 GPS running watch. (Does not include M400/M430 watches)Size: Wrist Size 5.51" -8.1" (140mm-205mm), Band Wide: 23mm. Flexible adjustment-this replacement belt can be adjusted according to multiple spare holes and metal buckles.Material: High quality TPU silicone material, non-slip, waterproof, soft and durable. Equipped with stainless steel tools to securely lock the strap to your watch.Customer Service: Package include: 1 * Polar M400/M430 watch band, 1 * tools. 12 months quality warranty. We provide physical products that are 100% the same as the picture, please rest assured to buy. If you have any questions, please contact us. We will give you a replacement or a full refund.Humanized design: Comes with tools to lock and remove Smartwatch more easily. It has very beautiful features and is a good gift for holidaymakers. A variety of colors can meet the needs of different occasions.