This is a genuine OEM approved component which is specially designed for use with Dotco and Cleco power tools. It is an identical replacement for a missing or a faulty valve that was installed on a new unit. The valve sits inside of the cylinder and it helps to generate the power, please make sure to refer to the owners manual and the app...Read moreropriate diagrams of your model for the correct location and application of this part. Keep in mind this high-quality item is made of durable metal with plastic and is sold individually.