Buffer Pack; 60 mL of each pH 1.68, 4.01, 7.00, 10.01, and 12.46

Save over 25% on pack compared to ordering separately|All Oakton pH buffers are traceable to NIST standard reference materials Buffer solutions help you calibrate pH instruments to ensure accuracy If unopened, shelf life is 2 years|Perfecty sized for portable needs|? Oakton? pH Buffer Bottles have pH/temperature tables printed on the labels for accurate calibrations ? Manufactured under ISO 9000 quality guidelines and traceable to NIST standards ? If unopened, shelf life is 2 years; once opened, use pH 4 and pH 7 within 90 days, pH 10 within 30 days ? Store buffers away from direct sunlight.|? Color coded for quick visual reference: - pH 1.68 buffer in clear - pH 4.01 buffer in red - pH 7.00 buffer in yellow - pH 10.01 buffer in blue - pH 12.46 buffer in clear Convenient 60-mL bottles come in a pack of five?ideal for field use. Grab one when you're on the go! Contains all "USA" pH calibration buffer values in one, convenient, pack.