IONIX Ph callibration powder, pack of 9, Ph meter callibration powder, Ph Buffer Solution Powder Ph Test Meter Measure Calibration pH Indicators, 9 pieces, multicolor

About this item

• 9 pcs ph buffer solution powder ph test meter measure calibration 4.00 6.86 9.18 bd
• ACCURATE. The pH calibration powder are produced under strict conditions, and pre-measured exactly to ensure accuracy.
• EASY TO USE. No need measure, just mix individual pack with 250ml distilled water separately, you’ll get standard PH buffer solution kit.
• LONG TERM USE. sealed by durable moisture-proof individual packets, 3 years shelf life.