Durable white polyester labels provide strong protection for harsh environments or conditions and resist moisture, scuffing, tearing and smudging Ultrahold adhesive sticks to more tough surfaces ensuring your label doesn’t fall off your package Extrastrong adhesive adheres to metal, plastic, glass and more Weatherproof labels with TrueBlock Technology are guaranteed to completely cover everything underneath so you can reuse mailing tubes, boxes and more They are easy to customize with online free templates and designs using Avery Design and Print The 812 x 11 sheets of labels are compatible with laser printers