Fab source alchemist help

So using the template in server/mysterybox/getboxes.cs works for the alchemist, but if I want to change the items, I can't find the items 4 digit number (2835,2833 etc) so I use the 'type' of an item, but it doesn't work. The ways I've tested are: '0xccc, 0xccc, 0sccc', '0xccc,0xccc,0xccc' '(0xccc, 0xccc, 0xccc)' and '(0xccc,0xccc,0xccc)'. Any help on this?

Yeah but where do I find those values/where can I create them?