Store Ring - Mix 77 RFI Range: 100 Khz-10 MHz Mix #77, Material: MnZn, Initial Permeability: 2000 F37-77 - .187" ID, RFI Range - .1-10 MHz 1.45 USD FT114-77, ID=.748", RFI Range .1-10 MHz 3.75 USD FT240-77, ID=1.4", AC/DC/Coax Noise Filter, RFI Range .1-10 MHz, Case of 100 795 USD FT240-77, ID=1.4", AC/DC/Coax Noise Filter, RFI Range .1-10 MHz 10 USD FT240-77, ID=1.4", AC/DC/Coax Noise Filter, RFI Range .1-10 MHz, Bulk Pack of 10 90 USD FT82-77, ID=.52", RFI Range .1-10 MHz 1.35 USD Ferrite Ring Combo Pack, FT240 - 1.4" ID, 10 Ferrites - Mix 31, 61, 77, RFI Range .1-2000 MHz 95 USD