About this item This fits your . Make sure this fits by entering your model number. Various sizes can meet different size requirements, flexible, wear‑resistant and durable, high elasticity and reliable in use. Compact and lightweight design makes rubber watch rings easy to store without taking up too much space. O‑ring rubber gaskets last a long time and you don't have to worry about durability. Soft and flexible O‑ring, easy to install, used to keep watches waterproof, prevent water getting into watch. Storing in a labeled and organized box, no need for sorting and sizing, very easy and convenient to use.