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DOG MATE Large Dog Door. The robust construction of this door makes it suitable for Labradors, German Shepherds and other large dogs to 25" (630mm) shoulder height. For dogs up to 25" (630mm) shoulder height. Self lining to 2" (50mm) thick - ideal for all doors and walls. Robust security locking panel. Silent action weatherproof flap with vision panel. Lightweight flap may be used by cats. Available in: White, Brown, Grey. Overall size: 143/8" x 173/8" (366mm x 441mm). Cut Out Size: 121/2" x 153/8" (318mm x 391mm). Thickness: Self lining to 2" (50mm) thick.