4 measurement strips:

• Free Chlorine: 0 – 1 – 2 – 3 – 5 – 10 ppm OCl-
• Cyanuric Acid: 0 – 40 – 100 – 150 – 300 ppm CA
• Alkalinity: 0 – 40 – 80 – 120 – 180 – 240 ppm CO32-
• pH: 6.4 – 6.8 – 7.5 – 7.8 – 8.4

Box of 50 strips

Origin: UK