![Closed Connector](http://byotubes.com/cdn/shop/products/Open_Connector_6_8b69fabd-228f-448d-9a8f-6575006db81b_{width}x.jpg?v=1557942499)
Closed connector serves several purposes. Firstly, it closes stash jars. However, it can also be used to cap pipes to aid in preventing water spillage in the event of a knock over. Finally, modules can be capped with a lid on either end and Isopropyl alcohol inside for cleaning.