Sealing up a mail slot?

Artec Draft Dodger Mail Slot - Gold Aluminum - 1 34-in x 8 34-in mail slot insulation Energy Efficient, Ideal for All Climates · Internal Brush Strip for Added Insulation and Privacy · New Design for All Thicknesses of Glass, and Even Insulating mail slot drop box The DraftGuard® Deluxe letter box slot with it's precision rotating open-sided hollow cylinder ensures a better insulating value The cylinder consists of

mail slot for door We talked about the main characteristics that make the new range of Coveme products for the insulation of latest generation electric motors highly