Quickly and accurately check compression on petrol engines.

Works with domestic and imported engines.

Spark plug adapters have O-ring for improved sealing.

6” heavy-duty stem with universal rubber cone adapter fits all Spark plug hole.

13” durable rubber hose.

Thread sizes: M10 x l.0, M12 x l.25z M14 x l.25z M18 x 1.5.

Gauge reads 0-300 psi.