Modulinear Slot Diffuser (1-slot to 8-slot) with Factory-Fabricated Low-Leakage Plenum Box.The slot diffuser features a Uniflex pattern controller that enables adjustments in both air volume and direction directly from the diffuser face, ensuring no visibility through the diffuser face. The plenum box is constructed from GI (Galvanized Iron) and internally insulated, incorporating a specially designed spring mechanism to ensure low-leakage installation.