4 oz. CE additive + 16 oz. Endz Only so you can develop roots & ends at the same time.
Pure anti-oxidant color additives that when added into any brand of color mixture, will develop the color in approximately 12 minutes WITHOUT HEAT! CE additive, covers gray 95% better, super conditions the hair and keeps color vibrant from color to color. 

When adding Endz Only into your left over color and massaging or painting it into the ends of the hair, you can develop roots and ends at the same time in approx. 12 min. WITHOUT HEAT!

https://stores.colorexpress.org/products.php?product=The-Color-Express-System-Large-Size-%284-oz-CE-%252b-Endz-Only%29&showHidden=true