Spectra Metals 3-in. Expandable Aluminum Gutter Strainer is designed to fit most downspout sizes, including 2” x 3”, 3” x 4”, and 4” round. This versatile gutter strainer is made from durable aluminum and easily installs by pushing it down into the outlet for a secure fit. Its expandable design ensures a universal fit, helping to keep your gutters clear of debris and functioning properly. Model Number: 4STRAIN