• Compatible with SHIMANO, SRAM and all other brands of MTB variable-speed systems. Incompatible with Shimano SLX, Micro Splin; Sram XD, XDR, GX, X01, XX1
• Compatible with HG, incompatible with XD, MS
• [Specification]: High quality 9-speed cassette, 11x40t Cogs: 11-13-16-20-24-28-32-36-40T
• [Weight]: 9speed11-40t (about 420g); 9speed11-42t (about 426g); 9speed11-46t (about 459g), suitable for all kinds of MTB
• [Cog Material]: Nickle-plated High Strength Steel; high-quality material improves the hardness and wear resistance of the flywheel, super anti-rust, All-round protection electroplating layer, adapt to harsh weather, Whether it's road climbing, wading, snowy wet Mud or Heavy Rainfall
• [Carrier Material]: Ultra-Light Aluminum Alloy, and Hollow Design Is Perfectly Combined, Reduce Bicycle Weight, Make Riding Easier
• [Split Structure]: The exquisite split structure is convenient to bring great convenience to later maintenance, easy to disassemble and clean

Don't know whether you should choose Aluminum Cassette/Steel Cassette or Freewheel? Read  before purchasing>>