Songbird Essentials Lonestar Purple Martin Replacement Doors with Round Alamo. Includes a set of 2 four hole door panels and a set of 2 three hole door panels, enough for a 14 room Alamo house. Replacement doors are made from the same heavy duty gauge aluminum your original alamo house is constructed of. Includes: Doors, hinges, porches, door latches and all hardware needed to replace the doors. Door entrance holes are 2 1/8 in diameter.