NATO - Nylon strap with stainless steel buckle and keepers. Comes with 4 premium spring bars. Comfortable and fashionable. Material: polyamide. Available in different sizes.WIDTH: The width indicated for each size corresponds to the spacing of the bracelet links and therefore to the width of your bracelet, take the time to measure it carefully.ACCURATE MEASUREMENTS - The ends of the rods are 0.8mm in diameter and will be locked between watch nuts or buckle clips.TAKE THE TIME TO MEASURE OR INFORM THE CORRECT SIZE OF YOUR WATCH.Comfortable to wear and easy to install. Masar A dynamic French brand focused on quality products.