Clinically proven for effectiveness and safety 

MaxCal Extenders ® : clinically proven medical product for the enlargement, thickening and straightening of the penis.

Penimaster Made in Germany

MaxCal Extenders ® and MaxCal Envy ®

are medical expanders (extenders) which elongate the penis in a physiologically proper manner over an extended period of time. For instance, this tissue stimulation is used for corrective enlargement , straightening or therapy of the penis before and after surgery.

The penile extenders can be used optionally over night ( read more ).

The physiological mode of operation of PeniMaster<sup>®</sup> penis expanders



The physiological mode of operation of PeniMaster ® and PeniMaster ® PRO for penis enlargement

A body part increases in size or changes its shape by means of the formation of new body cells within the part. Regarding the male genitals this natural procedure ends at the age of 20 at the latest. If the penis is to become larger or straighter afterwards ...

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Medical report


Studies and medical reports

Renowned urologists and medical specialists report on their experiences with PeniMaster PRO, for what penile problems the product is used and which results can be achieved as a result. You will also find studies and case studies on PeniMaster PRO here.

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Surveys on the topic penis







Surveys on the topic penis

The following online surveys show data and opinions related to questions most commonly asked about the penis.

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Why people believe in us

“The increase in length is clearly visible. There was a significant change in the minimum length of the penis when erect. According to this, almost 90% of the patients I recommended MaxCal Extenders to were satisfied  after using it for six months."
Dr.  Clemens Offei, 
Accra Ghana
“I have gained .75" in length and .25" in girth in my first month. The MaxCal Extender really is a MUST if your goal is penis enlargement.”
Emmanuel Osei Bonsu, Obuasi, Ghana
“I gained 1.4 inches in just 5 months!  I can’t thank you enough. Thanks MaxCal for giving me confidence”
Henry Asampana
Tamale, Ghana
“The results were visible after the treatment. Even my wife had noticed the difference and was happy about it”
Rahman Ghartey, 
Takoradi, Ghana
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