borosilicate glass culture tubes 16 x 125mm 19ml 4pks of 250

offers an outstanding line of high quality borosilicate glass culture tubes. They are neatly packaged in heavy duty boxes of 250 and are shrink wrapped to keep them particle free. The boxes are compact and designed to fit into most test tube dispensers. Tubes can be used for tissue culture and blood banks Tubes are chemically inert Made from superior quality borosilicate glass to reduce pH changes and contaminants that are potentially leached from tubes made from soda lime glass Tubes feature well-rounded bottoms and smooth fire-polished rims Material: Type 1, Class A Borosilicate Glass Produced in an ISO 9001:2008 Certified Factory Meets ASTM E890 specification, Type 1 requirements Conforms to USP Type 1 standards Packaging: 250 per box, 4 boxes per case (1000 each). Melting Temperature: (Log n=4): 1460°C (+/- 20°C) Softening Temperature: (Log n=7.6): 1220°C (+/- 20°C) Freezing point: -50°C