This O-Ring Adapter is designed to fit Cummins Engine K19 K38 NT855. It is a high-quality product manufactured in China. The adapter is made of durable materials that ensure a perfect seal and maximum performance. It is suitable for use in other engines and components, commercial truck parts, and accessories. The unit quantity is one, and the manufacturer part number is 4053490. This adapter is a must-have for anyone who wants to enhance the performance of their engine.