Wills Rings® O are precision-engineered, all-metal O-shaped static seals designed for high-pressure and high-temperature applications. Their seamless, round cross-section provides uniform sealing under extreme conditions, including vacuum and cryogenic environments. Made from corrosion-resistant metals, they offer exceptional durability and leak-tight performance, making them ideal for aerospace, nuclear, and other demanding industries. This is a External Pressure Vented version.