CHEMSOLUTE Universal pH-indicator paper, pH 1-14, 5m x 7mm, Refill pack with 3 rolls Back Catalog number: 2814-3ROLL Availability: In the manufacturer's stock Price on request - + Recommended 18901211 12.88mS/cm 250mL Conductivity Solution, one bottle 19,90 € 18901213 1408μS/cm 500mL Conductivity Solution, one bottle 37,41 € 18901182 DREF01 Reference electrode 19,90 €