Sada pufrů pH 4,01; pH 7,01; pH 10,01 Back Catalog number: HI54710 Manufacturer: Hanna Instruments Czech Availability: In the manufacturer's stock Price on request - + Recommended MA840 Polarographic DO probe with 3m cable Price on request MA915B/2 pH glass electrode for with 2meter cable. Price on request MA9305 Pack of 100 x 1.4V batteries. Price on request