Tests for Free Chlorine, Bromine, Total Chlorine, Alkalinity and pH. Designed specifically for on-site use by service pros, each vial contains 100 strips. Insta-Test PRO 400 measures Free Chlorine 0 to 10 ppm, Bromine 0 to 20 ppm, Total Chlorine 0 to 10 ppm, Alkalinity 0 to 240 ppm and pH 6.2 to 8.4 with instant results. This test strip is a 1-Dip method. Just dip and read to get truly instant results---only by Insta-TEST! No swirling or waiting times, the new Insta-TEST 1-Dip formula feature extremely stable color reactions without cross-contaminated pads. Measures Free Chlorine, Bromine, Alkalinity, pH, and Total Hardness>1-Dip method>No swirling or waiting times>100 strips This item cannot ship to APO/FPO addresses. Please accept our apologies. This product ships in approximately 1 days