Perfect Deviate Scale

Perfect Deviate Scale is a better than average scale from the mutated deviate creatures in the Wailing Caverns. Perfect Deviate Scales are only used in one Leatherworking recipe which is a reward choice for Deviate Eradication from the Wailing Caverns quest giver in the Wailing Caverns right eye socket cave, but the recipe is a superb one, and the individual scales sell for gold in the auction house.

Source
Perfect Deviate Scales are found on any of the deviate creatures inside the Wailing Caverns. Scales drop from these creatures and can also be skinned from them. The drop rate for this scale is low.

Leatherworking

 * Deviate Scale Belt