Motion Pro is dedicated to producing the most versatile, unique and durable products for professional and home use. Motion Pro tools are designed to be simple to use, yet durable enough to withstand the harshest conditions. One of their goals is to offer tools of convenience. Do it right the first time with Motion Pro Tools. Manometer fluid refill for the Motion Pro SyncPro Carb Tuner (P/N 08-0411). Proprietary petroleum-based mineral oil blend. Mercury free. Motion Pro blue color. Note: SyncPro Manometer Fluid Refill does NOT work with older Motion Pro mercury carburetor synchronizers.