Increase your profits by retaining lost-revenues and turn your good bartenders into the best bartenders with Exacto Pour Bar Test Kit. The Test Kit is an excellent tool for testing your bartenders free pouring and jigger pouring skills as well as training them on over pouring. Over pouring can become a costly habit; especially when liquor prices go up. Using the tool kit can help sharpen your bartenders skills and retain thousands of dollars that may have otherwise been wasted. Kit includes 3 Test Tubes 3 O-Rings 2 Visual Charts (US and Metric) One Duable Plastic Stand. On the included 3 test tubes. Two tubes include measurements for 1/4 - 3/4 and 1-1/4 - 1-3/4. The third tube includes measurements for 1/2 - 1 and 1-1/2 to 2. Proudly Made in the USA