Cat Door, Safety Pet Door with 4 Way Lock, Weatherproof & Easy Installation Cat Flap For Cats & Doggie, Silent Manual Pet Flap For Interior Exterior Door Wall/Wooden/Upvc Door with Tunnel (White,M)

• 【Size & Versatile】- Medium: 20cm x 19cm, Large:25cm x 23.5cm.thickness5.5cm.Perfect for interior and exterior doors of wood, PVC, metal, paneled etc. It also can be installed in windows, wall, cat litter box etc.
• 【4 Way Switching Mode】- The pet door can be adjusted by the red and green switches with tabs in 4 modes: only out, only in, both in and out, and fully locked, easy control of your pet's entry and exit.
• 【Easy Fitting】- Can be installed on wall/wood/Upvc door.After the necessary tools are ready, you can DIY easily. In addition, the tunnel depth can be cut on demand.
• 【Durable & Comfortable】- Made of sturdy plastic, the cat door interior door is ready to serve your pets for long time.
• 【Safe & Thoughtful】- The transparent flap let pet see through the door. Exterior rain seal is for waterproof. Brush strip eliminates noise from the door closing.

Installation Procedure：Step 1: Stick the REAR panel on the door with double-sided tape, and use a pen to draw around the OUTSIDE of the tunnel part of the rear panel. Step 2:Remove the rear panel and use an electric saw to cut out a tunnel hole on the door or wall. Step 3: Put the cat door into the tunnel hole. Step 4: tighten the screws with a screwdriver, then add the screw caps. Tips: Determine whether to drill holes for screws according to the material of the mounting surface.