18" Wheel Pet Carrier Multi Colored Paw Print; Pet Carrier Backpack 18" Wheel Pet Carrier Rolling and converts to backpack Fits on most airplanes; Removable bottom board for easy cleaning Fully Enclosed, 2 zippered pockets windows on three sides, Wheels & extension handle, unit measures 20" Carrier size is 18" x 14"W x 10"H Adjustable backpack straps