This O-Ring seal is designed to fit specific Cummins engines, including the KTA19, KTA38, KTA50, and NT855 models. The seals are manufactured in China and are made of high-quality materials to ensure proper functioning of the engine. These O-Ring seals are ideal for heavy equipment, including those used in the industrial and business sectors. With their reliable performance, they can help extend the lifespan of the engine while also improving its efficiency. Whether you're in need of replacements or simply want to keep extra seals on hand, this set is a great choice for any owner or operator of Cummins engines.