ferrule is generally treated as the core part of the connector. zirconia ferrules are recognized to have the best durability and reliability among various kinds of material. opcsun import logos equipments, with the ferrule blank from japan, our ferrules' optical and mechanical performance are good and exceed your expectation. material ferrule: zirconia ceramic flange: two slots flange made of stainless steel or ni-plated cu features: precise ferrule design makes outstanding fiber alignment pc, apc polishing high performance & durability low insertion loss and back reflection loss good concentricity applications: telecommunication fiber optic catv lan (including fitl, ftth and fttd) data networks fiber stubwi lc, mu fiber optic patch cord & pigtail & attenuator