It is specially used to inflate the small air eye of the ball,Special for inflatable balls/basketballs, etc., can be used on foot inflator pumps or iron cylinders.
Foot inflator link:https://item.taobao.com/item.htm?spm=a1z38n.10677092.0.0.1e3c1debqxoSwm&id=555902224932
Iron cylinder link: https://item.taobao.com/item.htm?spm=a1z38n.10677092.0.0.1e3c1debqxoSwm&id=16153324804
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