Dramatically reduces cooling system refill time, without mess and without introducing air-locks. No more time consuming cooling system bleeding and no more messy spills to clean up. Simply plug into the workshop air line, attach to the cooling system header tank and create a vacuum. Complete the process by attaching the filler hose and opening the valve allowing your premixed coolant to flow into the system. Supplied with three adaptors and storage case. Features & Benefits:Dramatically reduces cooling system refill time, without mess and without introducing air-locks.No more time consuming cooling system bleeding and no more messy spills to clean up. Simply plug into the workshop air line, attach to the cooling system header tank and create a vacuum.Complete the process by attaching the filler hose and opening the valve allowing your premixed coolant to flow into the system.Supplied with three adaptors and storage case.Model No. VS0042 Specifications: Model No VS00