Easily communicate the number to call in the event of a spill or leak with CHEMTREC’s Canadian Chemical Emergency Phone Number Markings for Railroad Tankers. Approved for use by the Association of American Railroads (AAR), these labels are printed with the Canutec/CHEMTREC emergency contact number on permanent vinyl. The markings measure 30 x 11.5 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.