

⚡ Calibrate like a pro, grow like a boss!
This Bluelab pH 4.0 & 7.0 Calibration Solution Kit offers NIST traceable, dual-level calibration solutions in convenient 500 ml bottles. Designed to ensure precise pH meter readings, it extends device lifespan and supports accurate monitoring in hydroponics, gardening, aquariums, and more. Ready-to-use with a long shelf life, it’s the essential tool for any serious grower or technician.
























| ASIN | B01GQVSQGG |
| Best Sellers Rank | #25,131 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #22 in Lab pH Meters |
| Date First Available | June 7, 2016 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.27 pounds |
| Item model number | BL-COMBO-1 |
| Manufacturer | bluelab |
| Package Dimensions | 7.28 x 5.55 x 2.76 inches |
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