-Trophy Air Replacement for the Wells 22618 Pre-Filter 22618 -Wells 22618 PRE-FILTER -22618 Fits Model: OC-2HG, OCG136, VO2HFGG1R208, WV-2HFG, WV-2HFGRW, WV-2HFGRWT, WV-2HG, WV-2HSG, WV-2HSGRW, WV-2HSGRWT, WV-4HF, WV-4HFRW, WV-4HFRWT, WV-4HS, WV-4HSRW, WV-4HSRWT, WVF886, WVF886RW, WVF886RWT, WV-FG, WV-FGRW, WV-FGRWT, WVG-136, WVG-136RW, WVG-136RWT, WVO4HF, WVO4HS, WVOC-2HFG, WVOC-2HSG, WVOC-4HF, WVOC-4HS, WVOC-G136, WVOG136, WVV-GRW, WVU-31CT