A PeniMaster penis expander is suitable for virtually every man

Vacuum pumps/hydraulic pumps - good as addition to PeniMaster

Vacuum pump for the penis in brown as an alternative to the penis expander

Vacuum pumps cannot be applied for a sufficiently long (several hours) period per training phase to exert a growth pulse on the penis. However, the additional application of vacuum pumps within the framework of an elongation treatment may be advantageous to support the formation of cells within the penis by means of intense blood supply and, thus, oxygen supply. The potency-supporting effect can also be increased by the double treatment.

Thus, using a pump for a few minutes once a day is recommendable.

Conclusion

Vacuum pumps are erection aides and are not suitable for long-term penis enlargement. 

Functionality:
The cylinder is put over the penis and then the air contained in the cylinder is pumped out. The ensuing negative pressure pushes blood into the erectile tissue of the penis, resulting in an erection. The pump is then removed and a ring is put tightly around the base of the penis. That prohibits the blood from flowing back into the body, ensuring a sufficiently long erection for intercourse.