Keep your Casio watch water-resistant with our range of genuine Casio O-rings. These essential components ensure a tight seal and protect your watch from moisture and dust. Maddisons of Durham, the UK's largest supplier of Casio parts, offers a variety of O-rings for different models. For the perfect match, search for your model number in the search bar. If you can't find what you need, please contact us, and we'll help order the correct part.