The product is a Brooks Instrument GF100 mass flow controller specifically designed for controlling the flow of ethylene (C2H4) gas. It is a high-quality unit with a model number of GF100 and a unit quantity of 1. The controller is capable of regulating the gas media with a range of 0-5V and has a 9-pin D connector for easy setup. This product is ideal for use in various industrial applications where precise control of gas flow is required.