2-in-1 fuel tester to quickly check both fuel quality and water content. For E10 gasoline, regular and premium, and 2-stroke engine blends. Fuel quality is determined in just a few minutes, also detecting the presence of water. An excellent tool for adding value to your workshop's service. Saving time and money troubleshooting. Excellent for raising customer awareness of fuel quality and the resulting problems caused by the use of unsuitable fuel. 3 chemical test strips in a clear, resealable bag - 12 bags in a box with a handy hook.