20 BIG PL50 - 20" X 4 ¼" Big 50 Micron Polypleated

This quality Pleated filter is made by GDW USA and is suitable for all 20 inch Big Blue, Big White or Jumbo sized Housings. Washable. If you are intending to put this filter in a housing and not wash or maintain it you should use the Gradient Density Polyspun 20 B PS GD 50 Filters as they are more suited to that treatment.