Starter Kit Includes Mail-In Rebate, Disposable Bedding Tray, Food Dish, Water Bottle, And Exercise Wheel Ideal For Hamster, Gerbil, Or Mouse Connect To Other Crittertrail Habitats To Create Additional Living Space Bar Spacing: .29" The Crittertrail Starter Kit Is A Fun And Colorful Value Habitat That Includes Essential Starter Items For Your New Hamster, Gerbil, Or Mouse. The Kit Includes A $10 Food Rebate, Top Mount Water Bottle, Exercise Wheel And Food Dish. The Habitat Features Quick-Release Twist-Knob Side Latches And Integrated Wire Front Access Door