The 2-level rolling rabbit cage is with a 2 cm bar spacing, it is perfect for little critters like bunnies, guinea pigs, ferrets, and chinchillas. This rolling rabbit cage provides years of fun. Better yet, this cage is super easy to keep clean! The two grid panels help keep the inner cage tidy, and the pull-out litter trays make cleaning a breeze. And thanks to the four 360-degree swivel wheels (two of which have locks), you can move around the cage without effort. Best of all, this bunny cage has a wide top opening for easy cleaning and decorating. Assembly is simple and quick. Yaheetech