Sales Kit
It's Combination of two or more items or service put together and make it as a bundled item. This wont be a real item to make the stock movements. its a virtual item, that actually connected with count and item codes of different items. Basically the less sold or non sold items are grouped with moving items and name it as a kit and sell it like combo offers with certain discount. Usually the festival offers and sessional discounts are also like that. Combo offers and bundled offers are also the same way it works.
Foreign Item
This is almost similar to the Sales kit, where the sale kit contains more than one item. But the foreign item contains only one item with its name only differed from actual name.