Materials: Shimano doesn't list the materials used

Who's this item for: These are a great choice for Downhill

Hardened 304 Stainless Steel tubes

Perfect for home mechanics as well as this folds up small which makes it easy to file away in your tool box

SunRace MZ91X 12 Speed Cassette - 12 Speed - XD Driver - 10-50T - Black Exclusive Materials: Shimano doesn't list theReplace your old worn out SRAM Eagle cassette with this wide ratio cassette from Sunrace. This cassette is primarily built from hardened steel which will keep wear down and boost longevity. Sunrace have also utilised a 7075 alloy construction on the 42 and 50 tooth sprockets to keep the weight in check. Those looking for a good value alternative to SRAM Eagle cassettes will appreciate this cassettes wallet friendly price point. Who's this item for: