QUICK, EASY INSTALLATION – NO TOOLS! Bird Stop – 4″ x 4″ – 2/pkg – Aluminum Alloy $4.95 Bird Stop – 4″ x 5″ – 2/pkg – Aluminum Alloy $5.45 Bird Stop – 4″ x 4″ – 2/pkg – Galvanized Steel (ideal for mice and squirrel problems) $6.00 CLICK IMAGE TO ADD TO CART