They're values directly gettable, like variables:
local ExampleItem = cItem(E_BLOCK_WOOL, 5, E_META_WOOL_RED); -- 5 red wool LOG(ExampleItem.m_ItemCount); -- "5" LOG(ExampleItem.m_ItemType); -- "35"; E_BLOCK_WOOL value LOG(ExampleItem.m_ItemDamage); -- "14", E_META_WOOL_RED value