Brain nipple is commonly used for jewel series (standard nipple included), brain series (brain nipple included).
Can not be used only for medical series.
It is possible to use as long as you can replace every 3 points of screw cap, nipple, cap hood.

1. This link is generated by HOYOYO Japan purchasing staff and can be purchased with confidence;
2. If not specified, the price of the item does not include domestic freight and bank charges in Japan;
3. If you have any questions, please feel free to contact customer service to learn more.