An excellnet grade of rubber. Low sulfur content. Size numbers are molded into the top. Each piece has one hole at the center with diameter of approximately 3mm. The given measurments are for Top Diameter(mm) x Bottom Diameter(mm) x Length(mm).

An excellnet grade of rubber. Low sulfur content. Size numbers are molded into the top. Each piece has two holes with diameters of approximately 3mm. The given measurments are for Top Diameter(mm) x Bottom Diameter(mm) x Length(mm)

Natural cork stopper for craft, science experiments and cap for glass bottles.

An excellnet grade of rubber. Low sulfur content. Size numbers are molded into the top. The given measurments are for Top Diameter(mm) x Bottom Diameter(mm) x Length(mm).

This high grade, medium wall rubber tubing is suitable for science experiments and general laboratory use.  It is perfect for experimentation dealing with the physics of different liquids. 

High Grade, Medium Wall rubber tubing for general laboratory use. Available in rolls of 3 meters (10 feet)