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PetSafe Wall Entry Aluminum Pet Door Extension Tunnel – Large

Amazon.com Price: $35.12 (as of 04/09/2023 23:27 PST- Details)

Compatible with the following PetSafe Pet Doors: Plastic Wall Entry Door (model # ZPA00-16203) ; Aluminum Wall Entry Door (model # PPA11-10917)
Extends Wall Entry Doors from 7 1/4 in to 12 in thick
Tunnel can be cut shorter to accommodate walls 7 1/4 in to 8 1/4 in thick