trueblocktm technology completely covers everything underneath, so you can reuse mailing tubes, boxes and more. Jam- and smudge-free guaranteed smooth feed sheet edges prevent adhesive build-up that causes jams. Quick-drying sheets prevent smudging. This product was made from wood that came from a certified managed forest. Laser and inkjet compatible. Label size – text: 4 x 6; label colors: white; machine compatibility: inkjet printers; laser printers; materials: paper. larger quantity quotes available. Please call 1-888-978-7759. this product arrives to most customers in 2-3 business days.