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This predator guard is designed to fit the Trio family of poles like the MPQ and DP-16(Posi-lock) purple martin bird house poles. Effective against animals like squirells and raccoons, this Predator Guard can help protect your purple martins from these deadly climbing predators.
Fits all Nature House posts or other 1-3/4" posts.

Will not prevent small snakes from climbing up without some modifications.Weight: 6 lbs.