SHIMANO Freewheel HG41 7 speed, 14-28T

See full product description and bike specification below.
Shimano Acera HG41 7 Speed MTB CASSETTE

TEETH: 11-28T (11-13-15-18-21-24-28)
With lockring
Hyperglide (HG) sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load
Close ratio gearing allows a more efficient use of energythrough finer cadence control
Sprockets are cut away to reduce weight without reducing rigidity
Nickel-plated finish offers hard wearing resistance to corrosion
Corrosion-resistant steel cassette lockring
For 7-speed HG chains