The JW Pet Company PetVille Roll-a-Coaster is the spinning, rolling pet amusement park! The Roll-A-Coaster comes with a unique wheel that spins & rolls along the track, allowing small pets to quietly glide back & forth across the top of the cage in either direction. The roll-a-coaster also features a second story loft, petting pod, durable food dish, wraparound wire wall, lookout, modular, add-a-feature design & the dwarf hamster tube especially made for extra small pets. Features: Dual action raised exercise wheel travels the length of habitat as it turns Three levels of play Removable high rise petting pod Climbing tube with patent pending ridges Lookout window Lock and Slide Universal Connectors Water bottle and Durable food dish Snap-Latch: easy open for humans, added security for pets Includes: 1 Petville Plaza Intended Pet(s): Hamsters, dwarf hamsters, gerbils, and mice Material(s): Plastic Color: Blue, Green and Yellow Product Dimensions: 14.5 in x 11 in x 21.5 in Directions: Modular design makes assembly a snap. No tools required. Size: XS.