Knothide Leather Scraps

Knothide Leather Scraps are a high-level skinned item. Although not used directly in any tradeskill recipes, a skinner can convert five Knothide Leather Scraps into one.

Source
This item is skinned from mobs in Outland and beasts in The Black Morass of Caverns of Time on Azeroth. As many as three scraps can be skinned from a mob.