India Engineers offers Gas Spring Piston Rod which is achieved by regulating the flow of gas and/or fluid through the valve design of the gas damper piston. Commonly used compression gas springs, when mounted in a rod-down orientation, achieve maximum damping when the piston reaches the oil near the point of full extension. This is shown in the animation to the right. Referred to as the oil damping zone, it provides a cushioning affect to slow the mechanism as it reaches the fully deployed position.