Top and Side Doors for easy access of the Pet. * This cage is very simple to assemble, we assembled it in less than 1 minute, majority of the part already pre assembled, you need simply open it. * This cage constructed with the 3/4" frame, forged from 20-gauge steel and reinforced by 1/2" diameter steel tubes for the strongest, sturdiest, most durable cage. * The cargo part is 36" Long, 24" High and 24" Wide. * The crate is 36" Long, 30" High and 24" Wide.