4PCS Compression Tester Adapter 10mm×1.0/12mm×1.25/18mm×1.5/16mm×1.5,Compression Tester Automotive Adapter Kit for Gas Engine,Engine Compressions Testers Kit Spark Plug Adapters. Multiple Size: You will receive 4pcs car compression tester adapters, thread specifications of 10mm x 1.0, 12mm x 1.25, 18mm x 1.5, and 16mm x 1.5, multiple sizes for various engine types, check the thread specifications before buying to confirm compatibility.
