pump size:
- x20 pump:1.96inch*7.48inch (Suitable for penile erection length less than 15cm)
- x30/max7 pump:1.96inch*8.66inch (Suitable for penis erection length greater than 15cm and less than 18cm)
- x40 pump:2.56inch*9.84inch (Suitable for penis erection length greater than 18cm and less than 22cm)
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