Selkirk-Metalbest Metalbest 4" Inner Diameter - Direct-Temp Direct Vent Pipe - Double Wall - Wall Support Band

4" x 6-5/8" Direct Vent Wall Support Band from Direct-TempUsed as a support along the wall to provide stability and one-inch clearance.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 points. The LockTab(r) is a unique desi...