15-Pack pH Meter Buffer Solution Powder, Easy and Accurate, Make pH Calibration Solution 4.01, 6.86, and 9.18

15 Packs pH Buffer Powder, Can Be Used To Make 15x250ml pH Meter Calibration Solution, Compatible And User-friendly For The Calibration Of All pH Meter/Tester, Accurate and Easy to use for Long Period.
Widely be used for testing pH balance of aquarium, pool, drinking water, RO system, Spa, hydroponics, etc

Features:
*15 packs ph calibration packets, no need to buy frequently.
*Come with a user-friendly guide, help to learn how to use and reserve, etc.
*Pre-measured exactly for accurate results.
*longer shelf life(3 years) than liquid pH calibration solution (1 year)
*Sealed with moisture-proof individual packets, convenient for reserve and carry.
*2-year manufacturer guarantee.

Easy to Use:
1.Prepare 3 x 250ml distilled water in container, and take out 1 set ph powder: 1 x pH 4.01, 1 x pH 6.86, 1 x pH 9.18.
2.Empty each packets in the 3 containers separately, you'll get 3 x 250ml pH calibration solution kit.
3.Calibrate your pH meter with the pH solution.

Package Includes:
*ph buffer powder kit
5 x pH 4.01 (Potassium Hydrogen Phthalate)
5 x pH 6.86 (Mixed phosphate)
5 x pH 9.18 (Borax)
*1x User's Guide