Potion Trade Signs

[Migas]

Can someone that knows how to do Trade signs help me, please?

I want to sell this potion on a trade sign:



What do I write on the third line?

Thanks

[Quievi]

373:16386

This is the item id and I believe that the item id is going on the third line

[Toxic_Demon93]

373:16386

This is the item id and I believe that the item id is going on the third line

This along with the quantity and how much you are storing on the sign so if you were to sell one it would be 1 373:16386:10. The "10" is just an example but that would be how many are stored on the sign

[Migas]

373:16386

This is the item id and I believe that the item id is going on the third line

Invalid. It says I don't have any potions when I am holding it.

I also tried and didn't work:
438:16386
438:16418
438:8226

[Quievi]

373:16418

myb this one?

[Migas]

373 is regular potion. 438 is splash which is the one I'm trying to sell.

[HvPanda]

373,16450

I used this link to calculate item db: http://minecraft-ids.grahamedgecombe.com/potion-calculator