The product features a simple design, easy installation and easy usage.Processing with precise cutting, the product has a perfect fitment for your car.Made of premium aluminium material, the product is durable and sturdy.The length of the product is 13.8cm, and the width is 16cm.It is universal for most cars.Item Name: Coolant Overflow TankMaterial: AluminiumFeatures: Aluminium, Sturdy, Precise CuttingSize Details: Spout Diameter: 3.7cm/1.46" (Approx.)Interface Diameter: 0.7cm/0.28" (Approx.)Product Size: 13.8cm x 16cm/5.43" x 6.3" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension differences due to different manual measurements.The principle of the product is to suck the blow-by gas formed in the crankcase through the negative pressure in the intake manifold and lead it to the combustion chamber to participate in the combustion again. These blow-by gases are mainly composed of oil vapor and combustible mixture. The oil is viscous. If it enters the intake pipe directly, it may stick to the wall of the intake pipe, which may cause carbon deposits to hinder the intake.Package Includes:1 x Coolant Overflow Tank