Thank you for viewing! This is a natural wood perch for insects, with a tree hollow (hideout) created within it. - Size: Height 28.0 cm, Width 15.5 cm Tree hollow entrance ① 9.0 cm x 2.5 cm Tree hollow entrance ② 4.0 cm x 2.0 cm (See photo 12 for details) - Material: Natural wood (Japanese oak) - Uses: Insect breeding perch, hideout, feeding platform - Design: Natural wood texture - Features: Two jelly holder holes on the top (4 cm diameter). The tree hollow section and the base can be separated and removed with screws. - For reference, a photo of a 75mm long stag beetle is included. (The stag beetle is not included in the product.) Flat stag beetle Japanese rhinoceros beetle