Approved for use by the Association of American Railroads (AAR), easily communicate the number to call in the event of a spill or leak with CHEMTREC's U.S./Canadian/International Chemical Emergency Phone Number Marking For Railroad Tankers. Printed on permanent vinyl, these markings feature the emergency contact phone numbers for Canadian, American and International chemical emergencies. The markings measure 30 x 11 1/2 in. and are sold per each. Labelmaster is the exclusive authorized label manufacturer of CHEMTREC. Only companies registered with CHEMTREC are authorized to purchase and use these labels. You may receive follow up from CHEMTREC regarding your customer status.