This pump from MSR comes in handy if you happen to have lost or damaged your current fuel pump. But you may choose to use it even if you have not lost or damaged the original one, since it improves the performance on any of the DragonFly's stoves. You will have more cooking options by using this fuel pump since it also significantly improves the control that you can exercise over the flame. It has been specifically designed for easier field maintenance out in the field, saving you lots of time.