This is a flat-type plaster formicarium specifically for ants. The plaster maintains the humidity crucial for ant keeping. How about this for your first ant keeping experience or for expansion? The sample in the 4th photo is the large plaster case. [Features] The case is thin and highly transparent, making observation easy. It is particularly comfortable for keeping a single queen or a small number of worker ants. By connecting nests, you can keep colonies from small to large scale. [Size] Small plaster case dimensions External dimensions (Width W x Depth D x Height H) (mm): 75 x 50 x 20 Outer diameter of tube hole: 8mm Inner diameter of tube hole: 6mm Tube length: Approx. 4cm (with stopper) Please comment if you need a water supply hole. If you wish to purchase multiple cases, Small plaster case One unit + 250 yen (feeding area without plaster + 160 yen) Large plaster case (90 x 70 x 23) One unit + 350 yen (feeding area without plaster + 250 yen) will be included. Tubes for additional units are sold separately for 20 yen each (4cm with stopper). Please comment if you need any. Each item is carefully handmade, so there may be minor scratches, dents, air bubbles, etc. The small cases may have some minor scratches from the time of purchase compared to the large cases. Please refrain from purchasing if you are concerned. Due to material costs, shipping, etc., the price is at its lowest, so we cannot offer further discounts. Thank you for your understanding.