Description 0-300 PSI 14mm & 18mm Compression Tester Compression TesterQuickly and accurately checks compression on gasoline engines Gauge registers 0 - 300 PSI and 0 - 2100 KPA Fits 14 and 18mm thread sizes. Skin-packed. Shipping wt. 15 oz.LIS20250 LIS 20250 LISLE20250 LISLE 20250