Hultec back-up rings provide critical anti-extrusion support for O-rings in high-pressure sealing applications. Engineered for demanding downhole and subsea environments, they prevent O-ring material from extruding into clearance gaps under high internal pressure—extending seal lifespan and ensuring long-term reliability. Available in single-ring configuration for unidirectional pressure or paired for bidirectional protection. In-house PEEK injection molding enables faster turnaround, lower volume costs, and custom near-net shapes. HPHT rated for downhole tools, MWD/LWD, wireline, subsea trees, manifolds, BOP equipment, ESP motors, valves, and high-pressure fittings.