OEM Rediform Purchase Order Form RED1L176. These carbonless purchase order forms come four to a page in a manifold book with a flexible cover. Each two-part form includes an original in white and a duplicate in yellow, consecutively numbered for easy tracking. The forms provide ruled space in a vertical format for filling in vital information and item descriptions. Each detached form measures 2-3/4" x 7" and the book contains 400 sets.