Reusable Mesh Filter - The pre-filter includes a washable fine mesh filter to protect your garden pump from leaf litter and other debris that can reduce its efficiency. Filters debris from the water - Protects your pump and controller from litter sheets and other debris that can reduce its efficiency. The pre-filter kit includes a washable fine mesh filter and comes with 2 connectors for easy installation . Package Content: 1 * 20mm Pipeline Filter.