The Pentair R18650 is a Lid for 186 Leaf Traps. To keep suction-side cleaners working at top efficiency without stopping to open and clean the pump strainer basket, use a Pentair Leaf Trap. Available in both medium- and large-capacity, Pentair Leaf Traps capture leaves and other debris poolside, where it’s easy to see, open and clean. It is a genuine Pentair product.