SHIMANO HG50 cassette made from steel, with nickel finish.
+ Teeth :
12-21 : 12-13-14-15-16-17-19-21
12-23 : 12-13-14-15-17-19-21-23
12-25 : 12-13-15-17-19-21-23-25
13-23 : 13-14-15-16-17-19-21-23
13-26 : 13-14-15-17-19-21-23-26
+ Weight (manufacturer): 311 g.
Teeth : 12/21, 12/23, 12/25, 13/23, 13/26