Selkirk-Metalbest Metalbest Direct-Temp 4" x 6-5/8" Direct Vent Storm Collar

4" x 6-5/8" Direct Vent Storm Collar from Direct-TempUsed to fit around Direct-Temp pipe just above the roof flashing to prevent water from leaking between flashing and pipe.Direct-Temp system features stainless steel inner and heavy duty galvanized steel outer walls. Heavy duty centering brackets keep inner pipe centered and chamfered edges allow for easy slide-together assembly. The free-floating inner liner allows the pipe to expand and contract under high temperature, without creating gaps or stress ...