This is a fan blade and it is made for an air conditioner unit, it may also be known as a room condenser fan. The blade is black and has a roughly 13-inch outer diameter. The function of this piece is to blow air over the condenser, which will cool the refrigerant and eventually cool the area. The tools you will need to make this repair include a pair of pliers, a screwdriver set, and a socket set. Before making this repair, make sure to unplug your air conditioning unit.