Denville_Sci_Boroscilicate Culture Tubes 400A new range of borosilicate glass culture tubes from Denville Scientific, South Plainfield, NJ, are designed to reduce pH changes and contaminants that can be leached from soda lime glass tubes. Featuring well-rounded bottoms and smooth, fire-polished rims, the tubes are chemically inert as well as tissue culture and blood bank compatible. Produced from type 1, class A borosilicate glass, the tubes meet ASTM E890 specification, type 1 requirements, conform to USP type 1 standards, and are produced in an ISO 9001-certified factory. Available in packages of 250 units, they are shrink-wrapped for purity and designed to fit in standard test tube dispensers. For more information, visit Denville Scientific.