AS23053/6, formerly M23053/6, is a heat shrinkable polyolefin, semi-rigid, crosslinked insulation sleeving with a 2:1 shrink ratio. This heat shrink tubing is available in a flame resistant Class 1 format or flammable Class 2 format with both providing continuous operating temperature range of -67 TO +275 °F (-55 TO +135 °C). Class 1 is available in various colors while Class 2 is available in clear. AS23053/6 semi-rigid polyolefin sleeving is used in wire identification by marking or strain relief applications.