"S17 SCIENCE LLC."

Assortment of 2-way stopcocks, syringes, and syringe extenders control the flow of liquids and gases, and make gas-tight connections.

Students can repeat the experiments developed by Irwin Talesnick, the retired professor recognized as one the premier chemical demonstrators.

The extender is used to make an air-tight connection between a syringe and plastic, vinyl, or rubber tubing.