FAIR-RITE
Ferrite Core, Cylindrical, 250 ohm, 28.6 mm Length, 25 MHz to 300 MHz, 6.35 mm ID, 14.3 mm OD
FERROXCUBE
铁氧体芯,屏蔽电缆 6.35MM
LAIRD TECHNOLOGIES
铁氧体磁芯, 10MM, 100MHZ, 250R