Hellermanntytons shrinktrak 31 ratio heat shrinkable markers make it easy to identify wire and cable the ladder style function has been designed to enhance the users ability to pick markers off the carrier the side slits have been specifically designed to ensure that the wire entry gap is as large as possible whilst remaining on the carrier strip this enables the user to quickly insert wire and cable into the marker for a complete labelling solution shrinktrak can be printed using heller