DuvinDD 15 Pack pH Meter Buffer Solution Powder for Precise pH of PH Meter, pH Calibration Solution Powder 4.00/6.86/9.18

Key features

• High Accuracy --- pH meter calibration solution accuracy is ±0.01pH. Sealed by durable moisture-proof individual packet to maintain freshness until use.
• ph Standard Buffer Powder --- Works with All electronic pH meters/ph tester. pH calibration powder is produced with premium quality material under strict conditions.
• Easy to use --- pH buffer powder is save time and money. Mix the buffer powder with 250ML distilled water, put the pH meter in the solution and gently stir and wait a few seconds for the result.
• Calibration powders enable you to test the pH of your pool, aquarium, water, and more quickly with your pH meter. Small size, easy to carry and store, very convenient.
• 15 Packets: 5* pH 4.00 Solution powder, 5*pH 6.86 Solution powder, 5*pH 9.18 Solution powder,cost-effective and flexible for using.