Mana Potion Injector

Mana Potion Injector is a potion item that restores 1800 to 3000 mana, and stacks in stacks of 20.

Source
This item is crafted by Engineers with a skill level of 345.

Reduced to its most base components, it will require the following materials to craft.

is available as both a random BoE world drop and a BoP drop from Kael'thas Sunstrider in Magisters' Terrace.

Disambiguation
There are two items with the name Mana Potion Injector, one with one charge, and one with twenty charges. Blizzard lists both in The Armory. The one with 20 charges lists no current source. Those should disappear from WoW as they are used up.

The flavor text on the old style Mana Potion Injector tooltip now reads:


 * "They just don't make 'em like this anymore..."

If you have an old style Mana Potion Injector or buy one from the auction house, be aware that they do not stack, but have 20 charges.