903 Series Aluminum Airfoil Blade Double Deflection Diffuser

Standard Features
Double deflection surface mount grille with adjustable airfoil blades
Front blades parallel to longest dimension, back blades parallel to the shortest dimension
Extruded aluminum surface mount frame with signature line marks
Provides 4-way air flow on one plane
Nylon bushings on adj. blades prevent metal on metal rattle
Countersunk mounting holes with color matching Phillips Pozidriv screws
Rust-resistant pre-coat with durable powder finish
Soft White
Screwdriver operated Opposed Blade Damper
2" ADC compliant square to round collar with a bead for ease of installation 
Heavy Duty Construction
MRI Compatible
Insect Screen
Fractional, exact I.D. and O.D. sizes
T-20 Tamper Proof Screws