The FlyStuff Foot Pedal is a simple and efficient tool designed to conserve carbon dioxide and reduce the risk of over-anesthetizing flies. When compared to a standard continuous-flow setup, the addition of this simple foot pedal to your Drosophila workstation can conserve CO2 by 500% or more, which can translate into huge savings. In addition to saving on CO2 cost, the FlyStuff Foot Pedal saves the time and tedium involved in having to frequently change out CO2 tanks. The solid brass barbed input and output fit 1/8" ID tubing.