iPower GLFILTPREFILT12L 12 Inch Replacement Prefilter for 12x 48 Air Carbon Filter, 12x48 Pre, White

iPower Prefilter is an invaluable tool to protect your carbon filter from particles and larger items that may clog or otherwise inhibit the function of the molecular carbon filter, avoid damaging expensive carbon filters. Choosing to use prefilter is a wise decision.