Find precision-crafted zirconia and cordierite ferrules for fiber connectors or stud welding. Kyocera's extrusion molding process creates ferrules with excellent coaxiality, and our precision machining ensures excellent concentricity with precise. Custom Ferrules are made of alumina or zirconia ceramics, with inside diameters from 80 microns to 1100 microns, in lengths from 2. 5mm, and with features such as multi-step, countersinks, flats, slots, grooves, and chamfers. Our Alignment Sleeves are manufactured to the highest quality. Thorlabs offers Ø1. 25 mm LC-sized ferrules are compatible with many LC/PC fiber components, as well as our ADAL1 mating sleeve or ADAL3 interconnect.