FEATURES:
- Checks cylinder compression from 0 to 300 PSI. (0 to 21kg/cm2)
- Fits 14mm and 18mm spark plug threads
- Equipped with air-hold valve and gauge reset button
- 13-inch flexible hose with 14mm and 18mm adapters
- Easy Reading 2-3/4″ Diamter Gauge
- 6″ heavy duty stem with unversal rubber cone adapter fits all plug holes