Lettry One Way Squirrel Door 3x3x9 Stainless Steel — 2-Pack Weatherproof Exit Tunnel

The Lettry One Way Squirrel Door is a stainless-steel, non-lethal exclusion tunnel that lets squirrels and other small wildlife exit openings while preventing re-entry.

If you have small wildlife getting into attic spaces, soffits or wall cavities, this purpose-built exit device offers a straightforward, humane way to encourage animals to leave through their original entry point. Designed for common 3 x 3 inch openings, the unit combines a weatherproof stainless-steel tunnel and reinforced mesh with a complete installation kit so you can secure it over active holes on roofs, siding, vents, chimneys or eaves without cutting new access holes.

How does the one-way door let animals leave but not come back in?

The Lettry design uses a tunnel that permits outward movement while blocking return access. Once positioned over an active entry hole, the slope and mesh discourage animals from navigating back through the opening.

• 3 x 3 inch opening with a 9-inch tunnel length to guide exit.
• Reinforced stainless-steel wire mesh resists bending and climbing back in.
• Installation hardware ensures a snug fit over the original opening to prevent gaps.

What materials and durability should I expect for outdoor installation?

Lettry units are built from heavy-duty stainless steel and reinforced mesh for long-term exposure to weather. The corrosion-resistant construction holds up to rain, sun and seasonal temperature shifts without deteriorating quickly.

• Stainless-steel body resists rust and maintains structural integrity.
• Wire mesh reinforcement prevents chewing and deformation.
• Durable finish suitable for mounting on siding, soffits, roofs and vents.

What comes in the kit and how easy is installation?

The product ships as a complete set: two exclusion doors plus screws, copper wire, cable ties and gloves so you can mount and reinforce the device immediately. Installation is intentionally simple—position the door over the existing hole and secure with the supplied hardware; the tunnel encourages the animal to exit naturally.

• Includes 2 exclusion doors for multiple openings or backup use.
• Mounting screws and cable ties for quick, temporary or permanent attachment.
• Copper wire and gloves help secure and protect vulnerable siding or soffit edges.

Will this work for different animals and common entry points?

The 3 x 3 inch opening and 9-inch tunnel are aimed at squirrels and similar small wildlife, and they are well-suited for typical roofline and wall entry points. While ideal for tree rats and small mammals, evaluate the animal size and behavior before using; larger species or birds may need alternative solutions.

• Best for squirrels and small mammals accessing attics and soffits.
• Fits common entry holes around vents, chimneys, siding and eaves.
• Not intended for very large animals—use alongside professional guidance if unsure.

Who is this for? Homeowners, property managers, and DIY-savvy renters who want a humane, durable way to exclude small wildlife from attics and wall voids will find the Lettry One Way Squirrel Door practical and cost-effective. It’s especially useful when you want to avoid destructive roof or wall alterations and prefer a non-lethal approach that leverages the animal’s natural tendency to leave through its known exit.