Photo 1 of **USED** Castle Filters One-Year HVAC Furnace Filter, MERV 8, 20x36x1, 1 Count (Pack of 1) MERV 8 - High Flow 20" x 36” x 1”

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Photo 1 of **USED** Castle Filters One-Year HVAC Furnace Filter, MERV 8, 20x36x1, 1 Count (Pack of 1) MERV 8 - High Flow 20" x 36” x 1”Photo 2 of **USED** Castle Filters One-Year HVAC Furnace Filter, MERV 8, 20x36x1, 1 Count (Pack of 1) MERV 8 - High Flow 20" x 36” x 1”