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This 8 mm (5/16") flexible rubber tubing is the right size for connecting to tubing connectors on glassware like condensers and filtering flasks. It has an inside diameter of 8 mm (5/16") and a 1.6 mm (1/16") wall thickness. The outside diameter is 11 mm (7/16"). It works well for general laboratory use but is too flexible for vacuum application. This tubing is made of high-grade, medium-wall red rubber and it comes in a three meter (10 foot) coil. The melting point is 230° F.
NOTE: Will not work with the 1000 ml filter flask.
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