DYMO RHINO INDSTRIAL HEAT SHRINK TUBE 12MM BLK/WHT IS MADE OF INDUSTRIAL GRADE POLYOLEFIN AND FEATURES A 3:1 HEAT SHRINK RATIO FOR PRINTING ON TUBING. MEETS MIL-M-81531, MIL-STD-22G, SAE-DTL-2353/5 (CLASS 1&3). TEMPERATURE RATING -19C TO +135C.