Function: Plays the role of balancing the pressure of the tank, and there is a corresponding scale, indicating the liquid level, and intuitively knowing whether the volume of is sufficient. Premium Material: The radiator expansion tank is made of high-strength ABS plastic material, which is resistant to high temperatures, wear and tear. Easy to Install: Rigorously manufactured to meet the , replacement for the old or broken one, improving time efficiency. Item Type: Engine Coolant Expansion Tank Part Number: 21721 JD00B, 21721 JD00B : for Color: White and black Material: Plastic Package Contents: 1 * Radiator Expansion Tank Only the above package content, other products are not included. Included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.