The wood fitting Dogwalk dog doors are designed to suit installation into wood ,pvc and metal. Models are available to suit panels 11mm-52mm thick,and due to its unique design, no cutting of the tunnel (liner) is required. The door flap is manufactured from high impact polycarbonate to endure the rigors of animal use. The new wood fitting door (W-DD) is proving very popular with its additional clip on security cover. This model is suitable for semi large dogs and is available in white and brown.