This brake fluid refill bottle with 1 L capacity is used for brake fluid dispensing or refilling, making it ideal for heavy-duty motorcycle, automotive, etc. The filling bottle is for automatically filling the new brake fluid to the master cylinder reservoir all the time while bleeding the old brake. It is designed to prevent the air from going into the brake system. Its universal design fits most master cylinders reservoir and is used to prevent spills. The bottle has a switch valve to control flow and prevent overfilling of master cylinder. Additionally, made of durable corrosion-resistant plastic, this refill bottle is extremely easy to clean.