Can someone clarify me about weight divisions in boxing?

minimumweight, 105 pounds (48 kg)
light flyweight, 108 pounds (49 kg)
flyweight, 112 pounds (51 kg)
super flyweight, 115 pounds (52 kg)
bantamweight, 118 pounds (53.5 kg)
super bantamweight, 122 pounds (55 kg)
featherweight, 126 pounds (57 kg)
super featherweight, 130 pounds (59 kg)
lightweight, 135 pounds (61 kg)
super lightweight, 140 pounds (63.5 kg)
welterweight, 147 pounds (67 kg)
super welterweight, 154 pounds (70 kg)
middleweight, 160 pounds (72.5 kg)
super middleweight, 168 pounds (76 kg)
light heavyweight, 175 pounds (79 kg)
cruiserweight, 200 pounds (91 kg)
heavyweight, unlimited.