The SUNPASS O-Ring, model FO00003, features a resilient core made from high-quality silicone (VMQ) elastomer, which is entirely encased in a seamless sheath of FEP fluoropolymer. This design ensures a bleedline-free performance. These O-Rings are fully compatible and interchangeable with standard elastomeric O-Rings as well as solid PTFE O-Rings, offering a reliable sealing solution for various applications.