"The membrane oxygenator is designed to be used to gas solutions for tissues, organs or cells. Gas is supplied via standard gas cylinders and temperature control is through a water circulator. The internal volume of the unit can be adjusted by selecting different sizes and lengths of silicone tubing. Silicone tubing is highly permeant to oxygen and carbon dioxide, as well as most other common gases. This permits rapid equilibration of solutions with most gas mixtures. The oxygenator's are made of borosilicate glass and thermally stable polypropylene, which can be sterilized by autoclaving, or with ethylene gas."