The 20530 is for 10mm thread adapter. 10mm Spark Plug Adapter for Compression Tester. 10mm Spark Plug Adapters for 20250 Compression Tester.
Lisle 20530 10Mm Spark Plug Adapter
Lisle 20530 Compression Tester Adapter, For 10mm Spark Plug Threads
Lisle 20610 Inline Spark Tester Ignition Spark Plug Diagnostic Tool New Sealed
12x Helicoil 10mm Spark Plug Thread Repair Inserts #R474-4 M10x1.0mm 1/2" Reach
10mm Spark Plug Compression Tester Adapter Set for Accurate Diagnostics
2PCS 10mm Spark Plug Compression Tester Adapter M10x1 Engine Leak Down Tool
