Large insided diameter ceramic ferrule (ID from 128 to 750 um as Customized) with high precision and reliability, excellent thermal stability, high hardness, high melting point and long lifetime. Varaieties Ferrule type: SC/ST/LC/MU/SMA, Varaitied Endface Shape: Flat, PC(Chamfer), Cone, Step and Pre-angle. Flange and slot upon option.