Photo 1 of TonGass Dog Door Replacement Flaps with Screws Compatible with Trixie Dog House Model 39533 Fits 15.35"x21.3" Dogs House Opening, Replacement Pet Door Flap for Outdoor Wooden Dogs Houses - Clear

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Photo 1 of TonGass Dog Door Replacement Flaps with Screws Compatible with Trixie Dog House Model 39533 Fits 15.35"x21.3" Dogs House Opening, Replacement Pet Door Flap for Outdoor Wooden Dogs Houses - ClearPhoto 2 of TonGass Dog Door Replacement Flaps with Screws Compatible with Trixie Dog House Model 39533 Fits 15.35"x21.3" Dogs House Opening, Replacement Pet Door Flap for Outdoor Wooden Dogs Houses - Clear