1.Number card:Double color board engraving on white background in b lack| etters, strengthen the three-dimensional sense. 2.Arc type door:There are more than 140mm width of the arc in the middle of the door, not easy deform for long term use. 3.Thicken and highten bottom base:Bottom base in 60mm heigh, one locker can bear 80 kg weight. There is arch design at sides in order to keep ventilated.