JIAKAI Ferrite Ring Core Black RFI EMI Noise Suppressor Cable Clip20Pcs

Quantity: 20PCS.Color: black,Material: magnet,plastic, Size (LWH): 3.7 inches, 3.1 inches, 0.7 inches, with 4 different size 5/ 7/ 9/ 13 mm inner diameter, Ferrite core with plastic cover; Helps to reduce EMI on AC power lines