Thermoplastic hard base multi-size flashing fits 4 in. vent pipe. Tested for ultra-violet, ozone and weather resistance. Fits any roof pitch to 45° approved for type B installations, and the elastomer collar is heat tested to 180°F.Thermoplastic hard base with elastomer collarApproved for all type B installationsTested for ultra-violet, ozone and weather resistanceCollar fits any roof pitch to 45°