Gentaur pH 4.01 Coloured Coded Buffer Capsules at 25°C - 50pk
http://www.pabra.org/shop/fm-07-cp1040-gentaur-ph-4-01-coloured-coded-buffer-capsules-at-25degc-50pk-8885
http://www.pabra.org/web/image/product.template/8885/image_1920?unique=5100e27
pH 4.01 colored-coded buffer capsules, 50 pack, designed for easy and reliable pH meter calibration.
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