• Perforated steel face
• R4.2 molded fiberglass back panel
• Accepts 6 - 14 in unique tab collar (6400 series) or 6 - 16 in unique snap-in collar (5400 and 5400PP series, 16 and 18 in only for R4.2)
• Bonded foil vapor barrier helps minimize condensation problems
• Fiberglass back R-4.2 absorbs sound

Applications: Fits standard 2 x 2 ft T-bar ceiling system