Selkirk-Metalbest Metalbest Direct-Temp 5" x 8" Direct Vent Firestop Spacer

5" x 8" Direct Vent Firestop Spacer from Direct-TempThis spacer is required when penetrating combustible materials with the direct vent system. Refer to the installation instructions for specific requirements.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 temperatur...