Sex your geckos the Northern Gecko way! We are now offering the perfect way to sex your geckos. Male geckos develop pores and can be seen under a 30x loupe as young as 3 months of age. The problem with sexing geckos is you can never get them to remain still enough to acurately determine if they have pores. With the Northern Gecko pattened petri dish method you can put the gecko inside the petri dish where it remains secure without the fear of the gecko getting lose. You can now loupe and sex the gecko with ease. This tool is perfect for crested geckos, gargoyle geckos, juvenile leachianus and other animals of similair size.