Both O-rings and X-rings are often referred to by the collective term “seals.” CTG’s experienced engineers will custom tailor a seal to fit your exact requirements, and manufacture 1 or 1,000 seals to your specifications that same day. O-rings are sized to the SAE standard AS568, which is known as a dash number. Metric O-rings are sized to the actual measured inside diameter. Custom sizes can be developed to suit your applications. Applications High or low temperatures High or low pressures Static or dynamic systems Corrosive environments O-Rings: Provide a simple and effective seal that can be used for thousands of applications. O-rings are manufactured in an array of materials to match any design needs. Quad Seal (x-ring): These can be used in a wide variety of static and dynamic sealing applications. Quad Seals should be used when seal life is important. Quad Seals allow for a narrower gland over standard O-rings. These are well suited for use on high pressure and pulsating pressure applications.