Black Ops Replacement Pre-Filter 12 in x 39 in White

Black Ops Replacement Pre-Filter 12 in x 39 in WhiteUse these for a pre-filter on you Black Ops? Carbon Filters. Match the pre-filter to your Black Ops? Carbon Filter size. Helps to extend the life of your Black Ops? Carbon Filter by keeping dust and other particles out. The white pre-filters give a bright, clean appearance.