Class no.4 Coupler. As much as 25 percent lighter in weight than otherClass flexible cover-up, Chance Line Hose helps protect workers from accidental contact with conductors. In accordance with ASTM D1050-90, Chance ozone/coronaresistant thermoplastic elastomeroffers excellent performance properties. To retain high-visibilityorange color, the special formulation exhibits superior resistance to long-term aging/checking. It does not absorb water.