The Rugged Radios clamp-on RF noise-reducing filter choke clip (small) is a clamp-style ferrite choke intended for cable diameters of 3 mm and under. It attaches to signal or power leads to reduce RF noise by providing a choke point on small-diameter wiring. The listing identifies it specifically as the small size for cables 3 mm and smaller rather than a general-purpose clamp.
Rugged Radios Clamp On RF Noise Reducing Filter Choke Clip Small (3mm and Under)