The original ANDROPENIS (20 years) is the only FDA registered and patented penis extender device sold in the US . Increase the length of your penis! enlarge your penis by +4 cm (1.6″)* In both flacid and erect states . Both Andro-extender and Andropenis are medical male enhancement devices which use traction in order to result in penis enlargement. Both extenders are safe, effective, and specifically designed for penis enlargement . 20 years of experience in the field of Urology. Over one million highly satisfied users!