For Audemars Piguet Royal Oak 15500/15400 Silver Butterfly Clasp Strap 26MM Features: 1. Viton material, which makes it able to withstand accidental drops, bumps and impacts, very easy to install. 2. Good wearing experience very soft and provides excellent fit 3. Easy to adjust to fit most people's wrists and can be adjusted to suit individual wrist size. 4. Suitable for AP Offshore Royal Oak 15500/15400/26331. Specification: Material: Viton Weight: approx. 30g Length: 125+75mm Thickness: approx. 3mm Size: 26mm Clasp: butterfly silver buckle Packaging Included: 1*Watch Strap Note: 1. Due to manual measurement, please allow 1-3mm error. Please make sure you don't mind before ordering. 2. Please allow 1-3 gram weight error. Please make sure you don't mind before ordering. 3. Due to different lighting in the photos and differences in monitors, the pictures may not reflect the actual colour of the object. Please make sure you don't mind before ordering, thank you