Use with any submersible pump when pumping water from a lake, pond, river or tank. These sturdy built screens will protect pump from sticks, weeds, fish and other large debris. 20″diameter x 20″ long. Heavy duty 1/2″x1″ mesh screen. Drawstring top allows for easy pump removal/inspection and will draw up tight to any pipe from 1-1/2″ to 4″ in diameter. Screens can be used vertically or horizontally.