Description: Hamster Sleeping made of Acrylic durable and friendly. Holes distribute evenly around making air circulation. Easily installed no glue non- light weight and portable.Ideal to sleep and The For:Small hamster chinchilla Gerbil Guinea birds and other little pets. Great gift for your pet your little friend will like it very much. Specification: Material: Acrylic Size single layer: Approx. 24.5 x 20 x 16cm/9.65 x 7.87 x 6.30inch Size double layer: Approx. 31 x 20 x 29.5cm/12.20 x 7.87 x 11.61inch Package Includes: 1 Piece Hamster Cage Note: Due to the light and screen setting difference the item s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.