5 sizes in 1 package! The HUAREW Clip-on Ferrite Ring Core RFI EMI Nose Suppressor Cable Clip is a set of 28 black plastic cable clips designed to suppress RFI and EMI noise. The clips are easy to use and clip onto cables to effectively reduce interference. The black exterior and frame color give them a sleek and professional appearance, making them a practical and stylish addition to any computer or networking setup. The HUAREW brand ensures quality and reliability in helping to improve the performance and efficiency of your cables.