Block Tester BT-600 Replacement Combustion Leak Test Fluid 16 oz<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>16 ounces / 474 ml (good for 16 tests in Block Tester brand combustion leak tester)</li><li>Use in Block Tester brand combustion leak tester or other fluid-based leak testers</li><li>Works with GAS or DIESEL engines as well as propane， CNG， and other alternative fuels</li><li>When fluid turns from BLUE to YELLOW combustion leak is present</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41G1zEgOZLL.jpg" noproxy>