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 MA920B/1 Combined pH electrode MA920B/1 Price on request HI1143B pH elektroda na fluoridové lázně,Hanna Instruments Price on request MA915B/2 pH glass electrode for with 2meter cable. Price on request