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<div>Welcome to our store! We hope you have a wonderful shopping experience!</div>

<ul><li>High Accuracy: These high-purity buffer powders precise pH calibration with ±0.01 pH accuracy at 25℃/77℉; They keep your pH testers and reliable for consistent results. 
High Stability: These premium buffer powders maintain accurate pH values of 6.86, 4.00, and 9.18, even after long-term storage, saving you from repeated purchases for pH calibration. 
Individual Packets: Includes 6 packets of pH 4.00 solution powder, 6 packets of pH 6.86 solution powder, and 6 packets of pH 9.18 solution powder; Each packet is individually sealed to freshness and accuracy, making them easy to carry and store. 
Quick Dissolution: These pre-measured pH buffer solution powders dissolve quickly, streamlining the calibration process; They contain no harmful substances, ensuring safe handling. 
Simple to Use: Compatible with any pH tester and probe; Just empty a packet into a clean glass beaker, add 250ml deionized or distilled water, stir gently until dissolved, and you're ready for calibration. 
Colour:As Shown 
Material:pH calibration powder 
Package Contents: 
1set * ph down 
Only the above package content, other products are not included. 
Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.</li></ul>

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18-Pack PH Meter Buffer Solution Powder, PH 6.86/4.00/9.18, PH Buffer Powder for Precise & Easy PH T

High Accuracy: These high-purity buffer powders precise pH calibration with ±0.01 pH accuracy at 25℃/77℉; They keep your pH testers and reliable for consistent results. 
High Stability: These premium buffer powders maintain accurate pH values of 6.86, 4.00, and 9.18, even after long-term storage, saving you from repeated purchases for pH calibration. 
Individual Packets: Includes 6 packets of pH 4.00 solution powder, 6 packets of pH 6.86 solution powder, and 6 packets of pH 9.18 solution powder; Each packet is individually sealed to freshness and accuracy, making them easy to carry and store. 
Quick Dissolution: These pre-measured pH buffer solution powders dissolve quickly, streamlining the calibration process; They contain no harmful substances, ensuring safe handling. 
Simple to Use: Compatible with any pH tester and probe; Just empty a packet into a clean glass beaker, add 250ml deionized or distilled water, stir gently until dissolved, and you're ready for calibration. 
Colour:As Shown 
Material:pH calibration powder 
Package Contents: 
1set * ph down 
Only the above package content, other products are not included. 
Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.