Cumberland Packaging Envelope 115 x 155mm Invoice Enclosed Box Of 1000Ensure your packing slips and invoices are clearly visible and securely attached with Cumberlands high quality Invoice Enclosed Packaging Envelopes. Designed for performance and durability, these envelopes feature a strong polyethylene construction with superior grade adhesive that prevents crinkling and avoids sticking to itself during application. With bold red and black "Invoice Enclosed" text on a clean white background, these envelopes offer