Reagecon pH 4.01 Coloured Coded Buffer Capsules at 25°C - 50pk
https://www.prextontherapeutics.com/shop/fm-07-cp1040-reagecon-ph-4-01-coloured-coded-buffer-capsules-at-25degc-50pk-1527
https://www.prextontherapeutics.com/web/image/product.template/1527/image_1920?unique=9bf258b
pH 4.01 colored-coded buffer capsules, 50 pack, designed for easy and reliable pH meter calibration.
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