This is the Shaman Enhancement Tier 4 Set. This is the first tier available in BC.
These are the three tiers available Pre-BC:
Tier 1: The Earthfury
Tier 2: The Ten Storms
Tier 3: The Earthshatterer
These are the three (enhancement) tiers available in BC:
Tier 4: Your'e Lookin at it ^_^
Tier 5: Cataclysm Harness
Tier 6: Skyshatter Harness