Large Pre-filter for most submersible pumps with vertical or horizontal discharge. Unique design allows for better water flow, pump cooling, and easy cleaning. A pump sock protects your submersible pump from large debris. It should be used for all submersible pond pumps that are not in a skimmer. (pump is not included) Filter is 10 inches in diameter and 6 inches tall. Filter bag is 10 inches tall with drawstring to secure to pump.