Replacement O-ring for Whale Watermaster sockets. Genuine Whale part: AK3031.Keeps your Whale Watermaster inlet sealed and leak-free. With an approximate diameter of 16mm, this O-ring is a simple but essential spare to have on hand. A worn or damaged O-ring can cause water leaks, so replacing it ensures a secure fit and reliable water supply. Easy to fit and made to the exact specifications of Whale's Watermaster system. A small part that makes a big difference in keeping your caravan or motorhome's water system working smoothly. Please note that you will require two O-rings for the inlet, and only one is supplied per package. The image shown is for illustrative purposes. SPECIFICATIONS• Approx. overall diameter of O-ring 16mm• Replacement inlet seals • Compatible with the Whale Watermaster inlet sockets• Ensures an easy and secure connection of the plug end• Easy installation