Combined glass pH electrode MA991B/1 Back Catalog number: MA991B/1 Manufacturer: MILWAUKEE ELECTRONICS Availability: In the manufacturer's stock Price on request - + Recommended 18901208 12.85mS/cm 250mL Conductivity Solution, one bottle 19,90 € 18901194 PH9.18 250mL 9.18pH, one bottle 12,74 € 18901211 12.88mS/cm 250mL Conductivity Solution, one bottle 19,90 €