If you've enlarged your Trio house Compartments from the standard 6" X 6" floors to the roomier 6" X 12" that martins prefer, these blank  replacement doors can be used to close off the back compartment entrance. Fits all Trio models sold by the PMCA. Will not fit other models or brands…

Discourage starlings from entering your Trio martin housing by using either the crescent entrance with a 1-3/16” x 3” entrance hole, or the Excluder® entrance with its revolutionary double-peg design. The replacement doors fit Trio Castle, Mini-Castle, Musselman, Grandpa, Grandm…

Replacement fronts for the "Alamo." Replacement doors with Starling Resistant Crescent entrances. The door unit comes complete with hinges, porches, door latch, and screws/nuts for easy installation. Includes a set of 2 four hole door panels and a set of 2 three hole door panels, enough for a 14…

Replacement fronts for the "Goliad." Replacement Doors with Starling Resistant Crescent entrances. Set includes a set of 6 two hole door panels, enough for a 12 room Goliad or Goliad Jr house. Doors are made from the same heavy duty gauge aluminum your original Goliad house is constructed of…