The 2017-2023 Chevrolet Bolt EV Power Brake Booster Master Cylinder OEM 367930711 is a genuine Chevrolet replacement part made of steel. This master cylinder with reservoir and cap is specifically designed for the Chevy Bolt model and year range, ensuring proper fitment and functionality. With the superseded part number 367930711, this product provides a high-quality and reliable option for brake system maintenance and repair.