Lettry One-Way Squirrel Door Excluders 2-Pack, 3×3×9 in Stainless Steel Contactless Wildlife Gate with Installation Kit

The Lettry one-way squirrel door excluder is a weatherproof, stainless-steel contactless gate that lets small wildlife exit an attic or chimney but prevents re-entry.

If you have chipmunks, juvenile squirrels, or similar small animals nesting in an exterior crawl space, attic vent, or chimney, this 2-pack of one-way excluders gives a non-lethal way to clear them out and seal the opening quickly. Each unit measures a 3" x 3" opening with a 9" tunnel, and the included installation kit has screws, copper wire, cable ties and gloves—everything needed to mount, secure and finish the job without specialized tools.

How does this one-way excluder keep animals from coming back?

The excluder uses a spring-loaded, one-direction flap that swings outward when an animal exits and snaps closed behind it. The design prevents re-entry because the flap cannot be pushed inward from the outside, and the stainless-steel housing resists bending or warping.

• Spring mechanism ensures automatic closing after exit
• 2mm stainless steel resists deformation and weather
• Copper mesh and adjustable flaps help seal edges to prevent gaps
• Contactless operation avoids handling animals directly

Will this fit the animal and the opening I have?

This model is sized for small wildlife: a 3"×3" clear pass-through with a 9" tunnel. It’s intended for juvenile squirrels, chipmunks, and other similarly sized species — not for large adult squirrels or raccoons. Always measure the animal and the hole before installing.

• Opening: 3 inches by 3 inches — ideal for small mammals
• Tunnel depth: 9 inches to allow one-way movement without trapping
• Not suitable for larger animals or family groups of adult squirrels
• Check animal size and behavior prior to mounting

How durable and weatherproof is the excluder for outdoor use?

The housing is fabricated from 2mm stainless steel to withstand rain, wind and temperature swings without rusting or losing shape. All mounting hardware is included so the unit can be firmly attached, and the copper wire and cable ties help secure edges for a longer-lasting seal.

• 2mm stainless steel construction for corrosion resistance
• Includes screws, copper wire rolls and cable ties for secure mounting
• Sturdy spring mechanism designed for repeated cycles
• Suitable for year-round outdoor exposure

How simple is installation and what comes in the kit?

Installation is straightforward: position the excluder over the exit hole, fasten with the supplied screws or staples, and use the copper wire, cable ties and adjustable flaps to close gaps for a complete seal. A pair of gloves is included to keep hands clean while handling the unit and any debris.

• 2 excluder cages in the pack for multi-opening coverage
• 8 screws, two 41.3-inch copper wire rolls, cable ties and gloves included
• Four adjustable flaps plus copper mesh to tighten the perimeter
• Nail or staple into place; monitor until the space is clear

Who is this for? The Lettry one-way excluder set is made for homeowners, property managers and DIYers who want a humane, low-cost way to remove and exclude small wildlife from attics, vents, chimneys and other exterior openings. It suits those who prefer a contactless solution that requires minimal tools, resists the elements, and includes the accessories needed for a neat, secure installation.