22PC Set 3.5mm, 5mm, 7mm, 9mm Ferrite Snap on Ring Cable Clip Core Noise Suppressor Interference Filter A3971
Black Ferrite Filter,10MM (0.375 inch) I.D. noise-suppression snap-bead. 38mm long x 24mm diameter.
Gray Ferrite Filter Core, 10MM (O.375 inch) I.D. noise suppression snap on bead. 35mm long x 20mm diameter.
Ferrite Cores are used for suppressing and dissipating high-frequency electrical noises. These filters are effective at attenuating EMI in electromagnetic circuits and devices. Ferrite beads, ferrite cores, and ferrite core inductors.