bubble bag help plz

i want to use the bubble bag dry ice method for all my trimmings i get off my plants at harvest and i see they have these kits with 5 bags i was wondering if i need all those or can i just buy 2-3 individuality with the microns i need i herd 90 and 120 are good

the three bag works just fine with the dry ice method....25 73 and 220 micron.
thats what i use....the key with dry ice though is not to over shake your bag because the leaf hardens with dry ice and becomes brittle....you really dont want leaf matter in your keif.
i use Monster mesh bags that i found off of monstergardens.com....they are like bubble bags but the entire bag is made of the mesh screen not just the bottom like bubble bags.
hope this helps