FK011-Linear bar grille with 0 angle blades Product Description Linear Bar Grille Diffuser Linear bar grille diffuserrs are designed for air supply and return air distribution. These barline grilles are high quality one-way floor registers with extruded aluminum construction. These linear floor grilles look great in any modern decor and are suitable for residential or light commercial applications. If your project requires custom linear bar grille diffuser, our team of craftsmen can create unlimited designs, styles, shapes, access points, special flange sizes, finishes and installation options while meeting all HVAC and building standards.