Stainless steel collar SS304, 9/16" with collars.

The tube fitting plug is used in the same way as the tube fitting connector, but contains a plug to hermetically seal holes in your master tubing.
Holes bigger than 5/16" in the master tubing can easily be plugged with this product.
Do not tolerate leaks in your master tubing anymore, you now have the solutions!

Mainline Connector (With Cap and Seal)/10 ct bag