Please make sure your watch model is listed in the description before purchasing, If not, please contact customer service To save your precious time and effort, and avoid the hassle of returns and exchanges, choose the correct size for your watch. It is very important to be accurate to the millimeter. 1、Resin material, waterproof and sweat-proof, anti-skid design on the back, comfortable to wear, safe and secure, durable 2、Compatible with Casio Protrek 270 model watch band,Not suitable for other models of watches 3、Use our free tools to make your installation easier 4、Use premium Stainless steel Buckle,durable 5、Replace your strap with our multi-color resin strap for a new look. It is an excellent original replacement. We have perfect after-sales service, please rest assured to buy Length 21 centimeters Item Length 5.31 inches Back finding Buckle Brand Seller or Collection Name RCNZWQB