What's in the box:

1 X Stainless Steel MTB Bike Bicycle Cycling Cassette Freewheel 11 Speed Rear Freewheel Bike Parts, Silver

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