The Eliminator differed from most j.o. gadgets we've seen in that it provides a soft rubber sheathe that goes over the cock before it's inserted in the vacuum-producing tube. The seal is provided by rolling the bottom end of the sheathe around the outside of the tube, and the combination of stroking sensation of the cock against the sheathe, plus the sucking action of the vacuum, should get the user off nicely. (The instructions do recommend applying a bit of vaseline to the base of the device to improve the seal.) The rubber bulb which produces the vacuum connects to the tube via a long hose, so he doesn't have to hold his arm up in the air while pumping. A bottle of lube is included. Available from Nasswalk.