The unique G-T® Ring provides a compact, double-acting seal for use in new designs or existing applications where O-rings are failing. The G-T Ring can be retrofitted into standard grooves designed for O-rings with one, two or no backups. 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 43,500 psi (3000 bar). For higher pressures consult Greene, Tweed.