Features:

Portable and handy:
These electrical interference filters are compact in size and light in weight, not occupying much space, easy to carry around when you go outside, bringing you a lot of convenience.

Good performance:
The rf ring is nice for cutting noise on USB, power cord, audio, video cables and more, suitable for homes, offices, dormitories and cars.

Specifications:
Material: plastic and ferrite
Color: black
Size:
0.11 inch/ 3 mm (inner diameter): about 0.98 x 0.51 inch/ 25 mm x 13 mm (outer size)
0.19 inch/ 5 mm: about 0.98 x 0.51 inch/ 25 mm x 13 mm
0.27 inch/ 7 mm: about 1.18 x 0.66 inch/ 30 mm x 17 mm
0.35 inch/ 9 mm: about 1.37 x 0.78 inch/ 35 mm x 20 mm
0.51 inch/ 13 mm: about 1.41 x 0.94 inch/ 36 mm x 24 mm
Total: 20 pieces

Package includes:
20 x Video noise filters

Notes:
Small items may include, please keep them away from little children.
Manual measurement, please allow slight errors on size.
The color may exist slight difference due to different screen displays.