This is the Shimano CN-HG701-11 Ultegra & XT 11-Speed Chain. This chain is compatible with all Shimano 11-Speed drivetrains but this is the Ultegra/XT level chain.
 
CN-HG701-11
 
SHIMANO STEPS E6000 - 11-Speed - Super Narrow - HYPERGLIDE - SIL-TEC -E-BIKE Chain
 
The HG701-11 chain is directional and features SIL-TEC treatment on the roller link plate and pin link plate for increased durability. It is compatible with 11-speed road, MTB, and E-BIKES thanks to its reinforced design.
 
Smooth and reliable shifting performance
Directional 11-speed chain
More efficient and silent, less maintenance
SIL-TEC surface treatment
MTB, Road, E-BIKE 11-speed compatible
Reinforced chain for E-BIKE use
New chain plate dimension
Weight: 257g (114Links)