The PetSafe Wall Entry Extension Tunnel is designed for walls more than 7 1/4" thick. Small wall entry doors can be extended up to 10 3/4" thick, while medium and large can be extended up to 12".

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The PetSafe Wall Entry Extension Tunnel is designed for walls more than 7 1/4" thick. Small wall entry doors can be extended up to 10 3/4" thick, while medium and large can be extended up to 12".

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