This is an original case specifically designed for raising bull ants (Myrmecia). Hybrid Nest type Yama wide is particularly suitable for raising bull ants. It comes with red sand, which is necessary for bull ant larvae to pupate. It is also equipped with a water supply test tube, making moisture management easy. You can enjoy raising bull ants with this case right away. The colony size目安 is 20 to 80 workers. - Moisture can be maintained using cotton or sponge, and water can be supplied without removing the cover, so you don't have to worry about the ants escaping. - We will pack the case with moisturizing cotton when shipping. Cotton can be easily replaced. - The connection hole is for 13/10mm tubes, suitable for bull ant size. - High-quality glass is used for the cover, making it scratch-resistant and allowing for clearer observation. - There are connection holes on all 4 sides, so you can freely connect nests and feeding areas, and enlarge the nest as needed. - It is made sturdy, so you can raise ants with peace of mind. - Five of the six connection holes have screw-type stoppers that are easy to remove, allowing for safe keeping and movement. - The glass cover is held in place by magnets at two corners. Suitable for large bull ants Myrmecia pyriformis "Giant bull ant", as well as small to large-sized ants found anywhere in Japan (such as Camponotus japonicus), green head ants, meat ants, and spiny ants. Easy to observe and raise, making it ideal for children's science projects. Materials: PLA (safe material for the human body), cotton/sponge, magnets Glass plate (2mm) Size: 9.6cm x 19.2cm x 2.6cm Connection hole: For 13mm tube (inner 10mm) Regarding the product at the time of shipment: Because it reflects light and makes it difficult to take photos, Some product photos may not have lids or magnets, but all nests come with a cover. Please prepare the connection tubes separately.