This wall tunnel kit appears to be a comprehensive solution for installing a dog flap through masonry walls. Here are the key highlights:

What's Included:

• 300mm tunnel liner (cut to fit your wall depth)
• Staywell 740 medium pet door with an internal blanking plate
• Four-sided tunnel with fixing corners and screws
• Suitable for walls up to 300mm thick

Key Features:

• Professional finish with proper tunnel lining for brick/cavity walls
• Includes blanking plate for cold weather or when not in use
• A tunnel was installed with a slight outward slope for drainage
• Medium size suitable for dogs with shoulder width up to 219mm

Installation Requirements:

• Cut-out size: 281mm x 237mm (to be confirmed)
• Overall frame: 352mm x 294mm
• Requires precise hole cutting before tunnel insertion
• Recommend silicone sealing around the outer frame
• Optional: expanding foam for quicker finishing

Important Safety Notes:

The warning about children potentially fitting through is crucial - this is a significant security consideration for families with small children. You'll want to factor in both child safety and home security when deciding on placement and whether to use the blanking plate feature.

The kit appears well-designed for DIY installation, although cutting through brick walls still requires proper tools and caution when working with utilities. The inclusion of the tunnel liner is essential for a weatherproof installation in masonry construction.

The PetSafe/Staywell 740 Medium Dog Door in White offers a convenient and secure entry point for your pet. With a see-through flap, it provides clear visibility for your pet, helping them enter or exit the house with confidence. The lockable security barrier allows you to control your pet's access when needed. This door is compatible with walls and doors up to 2" thick, and the included tunnel extension makes installation easy. A liner (such as a soffit board) is required for thicker walls.

Designed for medium-sized pets, the PetSafe 740 accommodates a maximum shoulder width of 8.6 inches (219mm), offering ample room for your pet to pass through comfortably.

Key Features:

• White Finish for a clean and modern look that fits various home decors.
• The See-Through Flap provides your pet with clear visibility for confident use.
• Lockable Security Barrier to control pet access.
• Tunnel Extension fits doors and walls up to 2" thick.
• Suitable for All Thicknesses of walls and doors (liner required for thicker walls).
• Maximum Shoulder Width: Fits pets with a shoulder width of 219mm.

Dimensions:

• Overall Size: 352mm x 294mm
• Cut-Out Size: 281mm x 237mm
• Maximum Shoulder Width: 219mm

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