The unique G-T® Ring provides a compact double-acting seal for use in dynamic applications where O-rings don't meet the challenge. It can be retrofitted into standard grooves designed for O-rings with one, two or no back ups. This proven seal combines a tough, resilient, T-shaped ring with precisely dimensioned pressure actuated anti-extrusion rings for use with pressure ratings up to 3,000 Bar (43,500 psi). The G-T Ring is ideal for HPLC (high-pressure liquid chromatography) guard columns where pressures can exceed 10,000 psi.