Maximum capacity of a box

[mygirls]

I a little confuse about the maximum amount I can get shipped in 1 flat rate box. Can 1 6 gallon kit, and 3 salfert kits fit into one box. If so, how much more can I "stuff" into the box?

Thanks in advance,

Victor

[Snarkys]

The box can contain up to three kits or two sixteen cup portions of any bulk item. These completely fill the box so another box would have to be used for the test kits.

even though it will be more expensive for many people we many end up changing to UPS because these boxes get to confusing.