Pentair R161185 No.3 Acid Demand Total Alkalinity Solution, 1-Ounce Test reagents acid demand total alkalinity solution 1-ounce solution bottle Used in No 78 and No 7000 Series, No 1300, PRO 11 Includes 1 per pack Measures 4-inch length by 10-1/2-inch height by 7-inch width