
What is not written does not bind. The purchase order and contract are what both sides return to in a dispute, so write them clearly and in language the supplier understands.
These lessons do not replace a legal adviser. For large orders, have a lawyer who knows international trade look at the contract; the cost is far less than losing an order.
Prepare a purchase order for your product with the eight items, and write the quality and defects clause in numbers. Then reread it assuming a dispute has happened: does the text settle it?