Generic Household RFI Kits Mix 43 Store/Ferrite Core Products/Mix 43Ring - Mix 43 RFI Range: 25-300 MHzRing - Mix 43 RFI Range: 25-300 MHzSnap On - Mix 43 - RFI Range 25-300 MHzSnap On - Mix 43 - RFI Range 25-300 MHzSlip On - Mix 43 - RFI Range 20-300 MHzSlip On - Mix 43 - RFI Range 20-300 MHz