Square Floor Tray (1 Piece). For M12K and MSS12 Houses. Allows Martin Nests to dry and allows the addition of Martin House Protectorant or DE under nests to reduce insect infestation. Allows approximately 1/4" air space between the nest and floor. This Floor Tray fits the left and right side compartments in the MSS12R Martin House. (8 required per house). See # 26242 for the center compartment. MINIMUM ORDER - 2 Pieces. May also be purchased in sets of 12 (Item# DN1).  Made in USA.