Products Microbiological media ready to use Test tubes Substrate for the breakdown of sugars and alcohols + raffinose. PwP-0309b Substrate for the breakdown of sugars and alcohols + raffinose. PwP-0309b Categories Test tubes Product description catalogue number: PwP-0309b Application: A medium for confirming the ability of bacteria of the Enterobacteriaceae family to ferment sugars. Pack size: 40 test tubes x 5 ml