Aluminum or Steel diffuser for lay-in 12” x 12” 3 modules with 4 way distribution, insulated backpan with 3” collar in sizes 06” to 16”. Fiberglass insulation included in R6 or R8. Excellent performance in variable air volume systems. MATERIALS: Galvanized metal sheet 26 gauge. Fiberglass insulation R-6 or R-8. FINISH: Baked electrostatic paint (polyester) white Vermont as standard finish or bright white. Sealed plastic packaging. Comparable to Titus Diffusers and Grilles