Common Mode Noise Filter – Coax Mix 31 Store / Mix 31 Ring - Mix 31 - RFI Range: 1-300 MHz Ring - Mix 31 - RFI Range: 1-300 MHz Snap On - Mix 31 - RFI Range 1-300 MHz Snap On - Mix 31 - RFI Range 1-300 MHz Slip On - Mix 31 - RFI Range 1-300 MHz Slip On - Mix 31 - RFI Range 1-300 MHz Typical user comment: The filter was quite effective. Was surprised that it actually reduced the noise level more than the signal so S+N/N improved by 1.9 S units. Bill