Smooth white EPM (EPDM rubber category) compound, peroxide-cured, heat-resistant. Heavily corrugated black synthetic polymer cover, enhancing flexibility, flame-resistant with textile finish. UL 94:2023 V-0 compliant. Operating temperature: -40°C to +120°C (-40°F/+248°F). Resistant to abrasion, aging, ozone, and UV radiation. High flexibility. Fittings available