No matter what size 1/2" poly tube you have the 1/2" Universal Nut Lock fittings will work.
These products are for a broad range of systems, we tried not to be specific on any one type of system.
Having maintained drip systems ourselves for decades these kit items are what we keep in our "Box on the shelf" which also includes items specific for our system.
Comes in a single plastic zip-lock style bag for handy storage.
Priced so its not painful to keep on hand......but when you need it it's priceless!
Make sure to get a few extra items specific for your system like a sprinkler or dripper. We like to keep two of each different model we use.