6-Bolt Disc Blue 12mm Thru x 157mm 32 Hole Bicycle Rear Hubs
This should correspond to the type of brakes you have on the bike.
We define color as the main color of the item. It may have accents or highlights in other colors.
12 x 157 axles are often called "Super Boost"
The hub drilling is the number of spoke holes. It must match your rim spoke count.