Thank you for viewing. This is a homemade artificial pupal chamber. Although there are some rough parts in the construction, there are no problems with its functionality. Since it is a handmade item, please refrain from purchasing if you are sensitive to imperfections. This is a spare, so it is unused. I will also send the case's Tupperware and lid together, so I think it will be easy to use and manage humidity. The size of the pupal chamber is 9.3 x 4.5 cm. It should be just the right size for flat-horned stag beetles and Japanese giant stag beetles around 8 cm. It can also be used for other stag beetles and beetles. I can also make other sizes, so please let me know if you would like one. Please leave any questions or consultations in the comments.