4 ounce bottle of green concentrate. This green goes in easy and heals super rich. When mixed with the yellow or white it allows you to make a wide range of lime greens and mint greens that will not disappoint. When mixing the green and yellow or white together in the cap I recommend pouring the consentrate green in first and then filling the rest of the cap with yellow or white. I usually put 25% green in the cap for light green, 50% green for medium green and 75% green for a rich dark green. Using this method its easy to experiment and mix your own custom tones and easly reproduce them every time.