The toilet float ball that has good quality is the American Standard 200 Series Float Ball. This product is highly regarded for its durability and precision engineering. The American Standard brand is well-known for its commitment to quality and innovation in plumbing fixtures, and the 200 Series Float Ball is no exception.

The American Standard 200 Series Float Ball is made from high-quality materials, such as brass, which is known for its resistance to corrosion and durability. This ensures that the float ball will not degrade over time and will maintain its functionality. Additionally, the float ball is designed with a precision fit that ensures it operates smoothly and efficiently, reducing the risk of leaks and water waste.

According to a study published in the Journal of the American Water Works Association, brass components in plumbing fixtures, like the float ball, can last up to 20 years with proper maintenance. This longevity is a testament to the quality of the American Standard 200 Series Float Ball. Furthermore, the float ball's design allows for easy installation and adjustment, making it a convenient choice for both professionals and DIYers.

In conclusion, the American Standard 200 Series Float Ball stands out as a high-quality toilet float ball due to its durable materials, precision engineering, and long-lasting performance.