2 – Horizontal Sill FG450, 1-3/4″ X 4-1/2″ – Horizontal Sill View/Download File FG451, 2″ X 4-1/2″ NON-THERMAL – Horizontal Sill View/Download File FG451T, 2″ X 4-1/2″ THERMAL – Horizontal Sill View/Download File