The product is a set of 150 vintage "Sales Book Order Receipt Invoice" carbonless copies with a store name pre-printed on them. These invoices serve as a record of sales and purchases, making them essential for business transactions. The carbonless copy feature ensures that the original receipt is not duplicated, providing a secure and efficient way of keeping track of business records. Perfect for office and industrial settings, this product is a practical and reliable tool for maintaining a detailed record of financial transactions.