The SecondaryeItemType extends the ItemType and is any item type that does not need to be equipped. This includes grenades, health packs, power ups, etc. SecondaryeItemTypes can be assigned to the same Items that the PrimaryItemTypes are assigned to, itís just that these Items will never be equipped. SecondaryeItemTypes specify a capacity since they do not use ConsumableItemTypes when being used.
The maximum number of secondary items the inventory can hold