Made in the US, out of premium “high test” polycarbonate, this Modular Incubator Chamber Base has been computer designed to promote fast gas exchange and allow for the rapid creation of a non-fluctuating low pO2 environment. The base has two ports which works with 5/16″ tubing. Comes with O-ring (MIC-104) and 2 Tubing Clamps (MIC-107).