The Aegis Mouse Bait Stations are made to handle two 1 x 1 mini blocks or two soft packs. The Generation Mini Blox are what is recommended to be used with the Aegis Mouse Bait Stations. Also available with a clear lid for at-a-glance inspection and reduced service time. Aegis Mouse Bait Stations provide more rodenticide capacity than any other leading brand. Additionally, unlike other mouse bait stations, Aegis Stations provide convenient placement flexibility for vertical or horizontal mounting. While the design allows for two mini blocks of rodenticide or one regular block of rodenticide to be safely secured inside, the see through tunnel entices mice to enter and feed. Features include built-in versatility, including vertical or horizontal mounting, anchoring holes for securing the Aegis Mouse Station to floors, walls or pipes, A key for keeping the station locked and secured, easy-open lid that allows for quick replacement of rodenticide bait, and heavy-duty construction for years of dependable service. Black Lid Dimensions (in inches): Length 5 1/2, Width: 4 5/16, Height (lid closed): 1 5/8, Height (lid open): 1 3/8.