The Testo 0554 2063 is a pH Buffer Solution 7.00 in a Dosing Bottle (250ml). The Buffer Solution is compatible with pH meter for the food industry Testo 205. The Solution is supplied with DAkkS calibration certificate. * Manufacturer's part: Testo 0554 2063 https://elecena.pl/product/27719654/testo-0554-2063-ph-buffer-solution-7-00-compatible-with-ph-meter-205 2025-01-19 https://elecena.pl/product/27719654/testo-0554-2063-ph-buffer-solution-7-00-compatible-with-ph-meter-205 2025-08-19