Thank you for viewing. This is a natural wood perch for insects, with a tree hollow (hideout) created. - Size: Height 16.0 cm, Width 11.0 cm, Tree hollow entrance 5.0 cm x 2.0 cm (See photo 9 for details) - Material: Natural wood (Japanese oak) - Uses: Insect breeding perch, hideout, feeding platform - Design: Natural wood texture - Features: With a jelly holder hole on the top (4 cm in diameter). The tree hollow part and the base part can be separated and removed with screws. - For reference, a photo of a Dorcus hopei binodulosus (75mm) is included. (The Dorcus hopei binodulosus is not included in the product.)