The 2.5mm OD Ceramic Sleeve For SC/FC/ST Fiber Connector is a precision-engineered alignment component designed for use in SC, FC, and ST fiber optic adapters. Manufactured from high-grade zirconia ceramic, this sleeve offers exceptional durability, high concentricity, and excellent optical performance. It ensures precise fiber alignment, resulting in low insertion loss and high return loss, even after repeated mating cycles. Compatible with both singlemode and multimode connectors, it is widely used in fiber patch panels, distribution units, and optical testing devices. An essential element for reliable and stable fiber connections in telecom and data center applications.