Ceramic Standard Optical Fiber Ferrule with High Precision and Reliability, Excellent Thermal Stability, High Hardness, High Melting Point, and Long Lifetime. SC Single-Mode Cone Shape on Endface, OD 2.4990mm, Concentricity 1.0um, ID 0.125/0.126mm, length 10.5mm with SUS or CU Flange.