12 millimeter Spark Plug Adapters for 20250 Compression Tester.
- 12mm Spark Plug Adapters for 20250 Compression Tester.
- The 20540 is for 12mm spark plug threads. Adapts to M14X1.25-6H Threads.
- 12mm Spark Plug Adapters for 20250 Compression Tester.
- The 20540 is for 12mm spark plug threads. Adapts to M14X1.25-6H Threads.