Click to enlarge

Made to fit any of the Erva manufactured martin houses, like Trio Castles, Pioneer and Grandpa style purple martin houses. These doors are a perfect fit.

Sold in packs of 6 doors, these 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 Crescent entrances.

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

Only use on enlarged compartments