Clips to add a 20x20 Furnace Filter to a standard Lasko box fan.
The standard fan is 4.125" thick.  This is the thickness of several Lasko fans I own -- one I purchased in 2022 and  one in 2019 from Home Depot and Menards.  Please confirm your fan thickness.
1in Slide-in - 6 clips (2 on each side and 2 on the bottom) to hold a 1in filter.
1in Seal - 8 clips (2 for each of the 4 sides) that snap on after the 20x20x1 filter is held next to the fan.  This provides a better deal between the filter and fan.
2in Seal - 8 clips (2 for each of the 4 sides) that snap on after the 20x20x2 filter is held next to the fan.  This provides a better deal between the filter and fan.
Standard color is white.  If you need a different color, please contact us.