Made to fit Erva/Trio/Naturehouse manufactured martin houses ONLY.
These doors are a perfect fit for Trio Castles, Pioneer and Grandpa style purple martin houses..

Save when buying more! This 12 pack of doors are great when you are ready to modify your TRIO houses, castle or mini-castle.
Choose Blank if you prefer to cut your own entrances or if you are enlarging compartments and need to close them off. Choose Crescent or Excluder entrances if you need a Starling Resistant Entrance Hole.

Protection from the destruction that can be caused by European Starlings is easy and convenient with these doors.

Only use on enlarged compartments
Made from Aluminum. Powder coat white finish.
PLEASE NOTE: DUE TO THE LARGE AMOUNT OF PEOPLE ORDERING THESE DOORS FOR NON-TRIO HOUSES, ANY ACTUAL SHIPPING CHARGES WILL BE DEDUCTED FROM REFUND AMOUNT IF YOU WANT TO RETURN THEM DUE TO NOT READING THE PRODUCT DESCRIPTION. THESE DOORS WILL ONLY FIT TRIO/ERVA/NATUREHOUSE PURPLE MARTIN HOUSES.