Six-way test kits are color coded for use of the reagents and hardness as well the tester block to hold the water. Featuring built-in color on the front, the deluxe square test block features easy-read fill indicators. Details: Blue case with multicolor contents 3.75" x 6.75" x 2.5" case size Easy-read fill indicators on test block Contents: Hard plastic case Test block Chlorine/bromine (0.74 oz. / 22 mL) pH phenol red (0.74 oz. / 22 mL) Acid demand (0.74 oz. / 22 mL) ALK-10 Total Alkalinity (0.74 oz. / 22 mL) ALK-20 Total Alkalinity (0.74 oz. / 22 mL) ALK-30 Total Alkalinity (0.74 oz. / 22 mL) Total Hardness solution A (0.74 oz. / 22 mL) Total Hardness solution B (0.74 oz. / 22 mL)