The Avery L4774REV-20 labels are perfect for temporary marking and signaling. The durable labels are made of polyester, making them very strong. You can use the labels both indoors and outdoors. The material is weather-resistant and waterproof. This means that the labels are not affected by UV radiation and temperature changes between -20 and +80°C. The adhesive provides a strong bond, but is easily removable without leaving any adhesive residue. The white labels can be printed with a laser printer. The package contains 20 sheets with a total of 80 rectangular labels.