SRAM NX Eagle Rear Derailleur 12 Speed Long Cage, Black

SRAM NX Eagle Rear Derailleur - 12 Speed, Long Cage, Black 
The NX Eagle rear derailleur features the proven SRAM 1x-specific X-HORIZON design. The larger, 14-tooth X-SYNC lower pulley easily facilitates 11- to 50- and 10- to 50-tooth cassette capacity, and also adds to NX Eagle's overall smooth-pedaling feel. The Type-3 ROLLER BEARING CLUTCH provides quiet, consistent performance and durability.
Mounting system and re-positioned Cage Lock offer greater durability
Eagle pulley technology provides greater efficiency, crisper shifting and quieter operation
Designed to be used with Eagle 12-speed chains
Long cage
Cable Actuated (cable not included) 
Model: NX Eagle Rear Derailleur
Brand: SRAM
Color: Black
Largest Cog: 50
Rear Derailleur Mount Type: 10x1 Standard
Chain Wrap Capacity (teeth): 40
Cage Length: Long
Also ebike compatible: Yes
Rear Der/Shifter Compatibility: SRAM X-Actuation
Drivetrain Speeds: 12
Manufacturer Part Number: 00.7518.119.000
UPC: 710845818028