Features: 1. 【Fitment】TU-15-26 diesel compression test adapter fit for Cummins ISB Engines 5.9L 2. 【Function】Use with diesel compression tester, to test cylinder pressure on diesel cars, medium-duty trucks, and pick-ups. An exquisite adapter supports your tester for more accurate measure. . 3. 【What you get】This adapter kit consists of a flex nylon Washer and two solid steel adapters. The combination of three elements can be perfectly installed in the groove of the injector. 4. 【Material】The products are durable, anti-corrosion, and oil-resistant. Its non-sparking and anti-magnetic qualities make it ideal for use on the . .