• DIY Supplies:Plumbing
• Display Type:Digital
• With Backlight Or Not:No
• Paper Size: approx 45mm x 7mm (L x W) The scale reads from 1 to 14:
•  1 - 3 indicates a very acidic substance.
•  4 - 6 indicates an acidic substance.
•  7 indicates neutral.
•  8 - 11 indicates alkalinity.
•  12 - 14 indicates a very high level of alkalinity.
•  PH 1-14 color chart in each pack.
•  The test strip color changes must be matched with the pH scale color chart within about 15 seconds.