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As the saying goes you pay for! Japan NPG NPG quality and Fujian Koizumi color masturbation cup is still a gap， the purchase price is also a lot of difference， this link is the origin of the name of the device in Japan Koizumi color masturbation cup! Comparison Chart：

 

 

 

 

If the resolution color Koizumi on masturbation cup is the original Japanese or non-Japanese original， please refer to the following picture：