Number 121 in photo ONLY.
This is an internal injection pump component. If you are certain this is the item based on the part number, great.
If you are buying random parts for an injection pump repair and are going off the title of the part, we would HIGHLY recommend that you verify with us before purchasing this item so we can verify it fits in your injection pump. Please get your pump serial and model number and contact us.
Bosch: 1464610302, or with the spaces 1 464 610 302