Our supplier buys over stock from the car manufacturers and sells Genuine Parts to us at a highly reduced cost. We like to pass those savings on to you by offering these Genuine Parts at a great price. It might not come in a Genuine Box but it is indeed the same Genuine Part you would get from the Dealer.
This is the removable unit mounted to the top of the master cylinder which holds the fluid. After servicing this system, you will have to bleed the hydraulic brake system.
Photo used for reference only - Actual product may vary