A150 Supply Grille  Single Deflection A250 Supply Grille  Double Deflection A550 Return Grille  Fixed Blade AG Louvered  Return Grille APERF Perforated  Ceiling Diffuser APERF Perforated  Return Grille AEC Egg Crate Lattice  Return Air Grille ALBG Linear Bar Grille AECFG Egg Crate  lattice Filter Grille APFG Perforated Filter Grille A550 FG Fixed Airfoil  Blade Filter Grille ALFG Louvered Filter Grille A44 Opposed Blade Damper
			- All .055 T6 extruded aluminum surface mount diffuser. - Nylon bushings for easy adjustment and quiet  setting of airfoil blades. - Foam gaskets - Countersunk mounting holes for flush appearances with color matching Phillips posi-drive screws. - Finish Standard: A) Soft White - Finishes Optional: B) Driftwood Tan, F) Satin Anodized A250H Series - Double deflection diffuser. - Front blades parallel to shortest dimension. - Back blades parallel to longest dimension. - All blades adjustable allowing 4-way flow adjustment. - With recessed screwdriver operated Opposed Blade Damper (A250HO). A250V Series - Double deflection diffuser. - Front blades parallel to shortest dimension. - Back blades parallel to longest dimension. - All blades adjustable allowing 4-way flow adjustment. - With recessed screwdriver operated Opposed Blade Damper (A250VO). Optional: - Fractional, I.D. and O.D. sizes available. View this product in Adobe Acrobat Reader?