Features:Each test paper can be tested at the same time:Total chlorine test range 0-1-3-5-10PH test range: 6.8-7.2-7.4-7.6-8.0-8.4Total alkalinity test range: 0-40-80-120-180-240Each bottle is divided into 5 small aluminum foil bags, each aluminum foil bag has 10 pieces and each bottle has 50 pieces..