This is a 20″x20″ return air can, made in America from American made 26 Gauge Steel Galvanized Sheet Metal, and a 20″x20″x1″ filter grille included. We will install a round, starting collar 14″ in diameter (Please specify size needed). The can is 5″ tall with a 1 ” flange on the open end. We offer free shipping to all 48 of the Continental United States; shipping to Hawaii, Alaska, or International shipping require special shipping costs. We are a complete sheet metal shop ,and can handle nearly any job. Please feel free to contact us with all your duct work needs!