Black Silk Pack

Black Silk Pack is a 10-slot general-purpose bag. Other silk bags include Small Silk Pack and Green Silk Pack.

Source
This item is made by Tailors with a skill level of 185.

The drops from:
 * Shadowy Assassins in Hillsbrad Foothills
 * Syndicate Spies in Alterac Mountains
 * Theramore Infiltrators in Dustwallow Marsh