The OEM Rediform Invoice Form RED7L721 is designed for efficient invoicing with carbonless copies. Each manifold book features a flexible cover and includes two-part forms with the original in white and duplicate in yellow. Printed in blue ink, these forms have invoice numbers in red at the top right corner, along with preprinted boxes for essential information such as 'sold to' and 'ship to' addresses. The detached size of each form is 7-7/8" x 5-1/2", making it convenient for various business needs.