Excellent Compatibility: Tu-15-26 Injector Diesel Compression Test Adapter Compatible with Cummins ISB Engines Used in Dodge Pick-Ups, School Buses and Medium-Duty Trucks.TU-15-26 Injector Diesel Compression Test Adapter is also suitable for 1998-2002 Cummins ISB 5.9L engine etc. High Quality Materials: The TU-15-26 Injector Diesel Compression Test Adapter 3-Pack is crafted from high quality plastic and steel to provide you with accurate and long lasting life. The plastic is lightweight and durable. Steel products are also strong and durable, anti-corrosion and rust-proof. Function: .