Metalbest 4DT-WT Direct-Temp 4″ x 6-5/8″ Direct Vent Wall Thimble – Black

4″ x 6-5/8″ Direct Vent Wall Thimble from Direct-TempThis two-piece wall thimble easily slides together for installation on wall thicknesses of 4″ to 7″. This serves a dual purpose as both a heat shield and firestop.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 design that allows for 360?rotation while securely locking the sections of pipe together with just a push of the tab.Features: Siliconozed fiberglass seal LockTab security Pipe rotates easily to align system components No sealant required 13″ x 13″ Base 3.7″ to 7″ adjustable depth Diameter: 6.75″ inner and 14″ outer High efficiency performance Connection Specifications: Joint/Connection Overlap: 1-5/8″ Joint/Connection Type: Twist-Lock standard on all diameters Material Specifications: Outer Wall: Heavy duty galvanized steel Inner Wall: 304 Stainless Steel