What's in the box:

1 X Stainless Steel MTB Bike Bicycle Cycling Cassette Freewheel 11 Speed Rear Freewheel Bike Parts (Standard), Standard

This 11 speed cassette freewheel delivers smooth and fast gear changes even under load.

Feature:
Easily tackle from fast flats to hills with 11-42 tooth gear ratio.
Wide ratio cassette for 11 speed, gear ratio: 11-13-15-17-19-21-24-28-32-36-42T.
Cog cutaways reduce weight but not the strength and rigidity.
Steel cogs with specially processing improve wear resistance.
Suitable for MTB bike.

Specification:
Material: S45C
Speed: 11
Weight: 557g / 19.6oz
Package weight: 694g / 24.5oz
Package size: 30.5 * 20.5 * 5cm / 12.0 * 8.1 * 2.0in

Package list:
1 * Cassette Freewheel