Dual Function: cave adopts a double layered composite donut/circular design, meeting the needs and of cats for drilling and playing, bringing fun to cats.The concave design of the dome of the tunnel bed allows another to rest, allowing both cats to use it simultaneously without interfering with each other. Felt Material: tunnel is made of felt material, which is wear-resistant, scratch-resistant, and will not get fluffy balls to meet the 's daily scratching and rubbing nature. A cave for indoor catsthat can be used in all seasons. Extra Space: tunnel cave measures 20 inches x 20 inches x 8 inches, the tunnel entrance is 7 inches in height, and the tunnel interior space is 8 inches in height.Plus an extra 7 inch round concave top rest area for cats and other animals up to 10 pounds. Zipper Separation Design: Quick assembly with just a zipper.The simple assembly makes it easier for us to clean every corner of donut tunnel, giving cats a clean and comfortable playing environment. Best Gift for Cats: Donut shaped tunnel bed is very to cats, and curious cats will definitely want to go inside and discover and fall in love with tunnels for indoor cats. It is suitable for multiple cats to interact and play, and it is the best gift for cats. Colour:Dark Gray Material:Felt Size:50x50x20cm Package Contents: 1 * Tunnel Bed Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.