DEI Hi-Temp Shrink Tube 3mm x 500ft Spool - BlackProfessional grade military spec flexible polyolefin tubing provides excellent electrical insulation, protection from dirt, dust, solvents, and foreign materials as well as providing strain relief. Over expanded tubing easily fits over the end of wires and connectors and shrinks down to 33% of it's original diameter for a snug water tight protective seal without a reduction in the tube's original length. Hi Temp Shrink Tubes can be used to insulate