The Avery L4776REV-20 labels are perfect for temporary marking and signaling. These durable labels are made of polyester, making them very strong and hard to tear. You can use the labels both indoors and outdoors. The labels are waterproof and weather resistant. The labels are thus not affected by UV radiation and temperature fluctuations between -20°C and + 80°C. The adhesive provides strong grip, but is easily removable without adhesive residue. The white labels can be printed on with a laser printer. The package contains 20 sheets with a total of 240 rectangular labels.