Super suction pump with tight latex seal and see thru sculpting cock cylinder. Quality metal quick-air release valve. Be Mr. Big! Some Men swear by the use of pumps as effective tools for increasing size while others think pumps have no lasting effect. Pumps can extend length while using, but the question is, Will the penis return to original size after using? Unfortunately, we do not have that answer and can not guarantee or be responsible for any results. Please note this does not have a valve, uses an air hole only.