This listing is for a dust seal that are compatible with Cummins Diesel engines, including the NTA855, KTA19, KTA38, and KTA50 models. These dust seals are made to high quality standards and are manufactured in China. They are designed to provide reliable protection against dust and debris, ensuring the optimal performance of your engine. These seals are sold as a unit and the manufacturer part number is 3023129. This product is ideal for those looking for a reliable solution to protect their Cummins Diesel engine from dust and debris.