Zirconium ceramic ferrules and sleeves On-site assembly with standard commercial tools Hexagonal crimp width: 4.52 x 10 mm Pre-fabricated convex front face ensures short polishing times and excellent optical properties Coupling suitable for multimode and single mode Insertion loss at couplings: 0.2 dB Insertion loss at connectors: 0.4 dB Colour of SC connector/ coupling housing: blue SC couplings with plastic housing including self-cutting screws (snap or click-in mounting) ST couplings with metal housing Cable connection O: 2.6 → 3 mm