Lang Tools TU-15-20 Diesel Compression Adapter (3/8" Injector) For use with Lang TU-15 Diesel Compression Tester Applications: Caterpillar 3208 and 110, J.I. Case 70 Series 188 and 207, and John Deere Early 300, 400, 500 Series, 276, 404, and 531 CID