Disposable Culture Tubes are suitable for Tissue Culture work and General Bacteriological use. Tubes are made from Borosilicate glass having co-efficient of Linear Thermal Expansion 49 X 10 -7K-1 (1st Hydrolytic class, Chemically highly resistant special glass). Tubes are packed in trays having shrink wrapped with plastic film or packed in cardboard box with tube dividers, having dust free without any contamination. Supplied w/o caps.