Shimano Deore CS-M4100 - 10 Speed Mountain Bike Cassette - 11-42/46T. High performance 10-speed Dyna-Sys cassette. Alloy cassette lockring. Sunrace MX8 - 11 Speed MTB Cassette - 11-46 - Black. Six largest sprockets are mounted on lightweight alloy carriers to reduce weight and increase rigidity.
eBay