Timm Osbon ErecAid Classic Manual Vacuum ED Penis Pump OTC This is where Timm Osbon excels. As part of their manufacturing process for each pump cylinder, they carefully buff the edges of the cylinder to an exceptionally smooth finish. This allows the cylinder to be used comfortably with or without its size adapter. The smooth cylinder edge also helps create a better vacuum seal. Like other pumps, the Osbon Classic Pump includes a vacuum release button that instantly eliminates pressure inside the cylinder in the event that too much pressure is applied.The release button on the ErecAid pump is strategically placed to reduce the occurrence of accidental pressure release while pumping. On some other pumps, the occurrence of unintended pressure release is more common, causing the user to have to begin the pumping process again.The pump cylinder is made from thick, hard plastic that is virtually impervious to breakage or damage. We don’t recommend it, but you could probably use this pump cylinder to drive nails in wood without it breaking. Other pump cylinders, although reasonably tough and rigid, can flex or bend if enough pressure is applied.The manual pump head on this pump is also made of hard plastic, ensuring that its moving parts will not break. You will notice this durability for yourself as soon as you pull this pump out of its box. Items Included in the Osbon Manual Vacuum Pump 2 ErecAid tension rings.2.5 ounce tube of lubricant.Cylinder size adapter.Detailed user manual.Ergonomic manual pump.Extra-durable pump cylinder.Pump tubing and coupler.Zippered canvas case.Osbon Manual Penis Pump Safety Features Safety release valve prevents injury.Osbon Manual Penis Pump Features and BenefitsContoured, ergonomic edges for a comfortable fit.Manual operation for high level of control.Manual operation for high level of control.No prescription required.Smooth cylinder edges for a comfortable fit.Strategically placed release button.