3M™ Heat Shrink Tubing MW is color coded for quick and easy identification of the wire. It provides a skintight fit and strain relief sealing of electrical connections, wire splices and components. This heat shrinkable tubing is co extruded and cross linked to offer a meltable inner wall. When the tubing cools down, it forms an insulating barrier to chemicals and solvents. It withstands temperatures of 67 to 230 degrees F ( 55 to 110 degrees C). UL Listed, SAE SAE AS23053/4, Class 1, CSA Certified and RoHS 2011/65/EU Compliant. 3M™ Heat Shrink Tubing MW is a semi-rigid, 110 °C (230 °F) heat-shrinkable polyolefin tubing that is co-extruded and selectively cross-linked to provide an integral, meltable inner wall. When heated in excess of 135 °C (275 °F), the inner meltable wall of the tubing is simultaneously softened and forced by the shrink action into intimate contact with all underlying surfaces, interstices and small voids.