Clip these suppressors—also known as ferrite beads and ferrite chokes—around data, USB, video, and sensitive-equipment cable to curb electromagnetic and radio frequency interference. You can attach them anywhere along the cable, even if the cable is already terminated or plugged in.

Suppressors work best when they match or are sized as close as possible to the cable OD. Suppressors with a rigid grip have rigid plastic tabs that firmly hold specific cable ODs and keep the suppressors from sliding out of place. Use them when the position of the suppressor is vital to effectively reduce the interference. Suppressors with a flexible grip have flexible plastic tabs to hold a range of cable ODs. Use them when working with an assortment of cable sizes or if you don’t know the exact OD of a cable. They do not grip as tight as suppressors with a rigid grip. They also may not work as well when used with the smallest cable OD in the range.

Some of these suppressors can be mounted for a more secure hold. Mounting them protects the suppressor and the cable from damage due to unwanted movement. It’s also good for managing cable to keep it organized. Use the adhesive pad to stick adhesive-mount suppressors in position.