Ideal for bulk mailings & identification, these shipping labels are designed for high-quality performance in both laser & inkjet printers. Bright-white label stock produces sharp text & rich colors. Labels feature permanent adhesive, & are acid-free, archival-safe & lignin-free to prevent yellowing or becoming brittle over time. Labels are easily formatted in popular word processing programs. Each sheet includes four labels. Letter-size sheets feed automatically from your printer's input tray.