How to cover this mail slot up so cold air won't come in?

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Home Accessory Mail slot, with interior door Call For Price! MSD112 Mail Login to add product to wish list Wish List Home Accessory Mail Slot Cover

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玥可藍 A: To help ensure your door mail slot is secure, install both interior and exterior mail slot covers Mail slot hoods are another way to prevent someone from Typically for Doors & Walls Thicker Than 3 Inches Engineered for maximum insulation performance, our DraftDodger™ Insulated Mail Slots cut drafts, reduce