SIZE: Length x Width: 7.87x 7.87 inch(20 x 20 cm),, fit for any small pets, such as parrot, hamster, ferret, baby rat, sugar glider, adult rat, guinea pig, chinchilla, squirrel and etc. MATERIAL: Made of cozy, soft and superb quality material, coral fleece + arctic fleece, provides a comfortable resting place for your pet, offering unparalleled warmth and comfort. NECESSARITY OF HAMMOCK: Full use of the large space of the cage, hammock is always a great cage accessory to makes the cage more stereoscopic by attaching to the cage with clips. DOUBLE-LAYER BED: Double layers for the pet shuttling, it’s a good option to meet their nature of addicting running in the tunnel back and forth, to be as a good entertainment stage, which they can either lounge on the top layer or snuggle in the bottom one. EASY TO USE: Easy and quickly attaches to cage interiors with included 4 metal hooks.