Our gutter guards prevent leaves, debris, twigs, and dirt from clogging downspout pipes or rain gutters. They also help block pests from entering the gutter system. These gutter strainers are made of waterproof aluminum alloy, providing durability, water resistance, and weather resistance for long-term use. These leaf guards not only filter debris but also help protect downspouts from pests, preventing them from nesting in the gutter spout. No tools required. Simply insert the strainer into the downspout opening and push into place. Wear gloves when handling the strainer mesh to avoid injury from sharp edges. Material: Stainless Steel. Size: Fits 40mm to 50mm downspouts. Package includes: 1 x Downspout Filter. Slight variations may occur due to manual measurement and display differences.