This is a genuine Oster replacement part, it is sold individually. This is the new round Jar design. If you have the old style Jar, you will need to order the part numbers, 124462-000-090 Jar Cover & 050613-002-089 Filler Cup.
The 031014-104-000 Agitator is sold individually. The Agitator Assembly (Or Blade Assembly) is the part of the blender that chops, blends or mixes the product that is put into the blender jar. After time the blades will become dull or break or the spline that is attached to the shaft may wear out. When replacing the Agitator it is advisab...Read morele to inspect the Sealing Ring, which is in between the agitator and the jar for cracks and if it has been compressed too much, which will cause it to leak from the bottom.
This is a genuine Oster replacement part, it is sold individually. The Filler-Cap is used as a cap for the blender. It can also be removed from the blender jar cover for the purpose of putting small food items in the blender without removing the entire jar lid.