Labelmaster l22 black arrows up air label, 3 1/4″ x 4 1/2″, 500/roll protect your products from mishandling during shipment with labelmaster’s black arrows up labels. These air labels comply with the requirements in international air transport, icao and dot for marking the package orientation on a hazardous materials package. Printed on paper, they have outstanding chemical and abrasion resistance, feature strong adhesion to corrugated boxes, and help keep you in regulatory compliance. The labels measure 3 1/4 x 4 1/2 in. And are sold in rolls of 500.