MU Ferrule Assembly MU Zirconia Ferrule, Multimode, with standard Flange Full Size PDF Drawing Part NumberID Hole Size FAZI-MU-126Multimode 126 µm FAZI-MU-127Multimode 127 µm FAZI-MU-144Multimode 144 µm FAZI-MU-230Multimode 230 µm * Also available with custom ferrule ID sizes