Spiral Pipe Diffuser with Transition Box SD52-14X8G Residential Registers & Grilles 904 - Double Deflection Adjustable

904 - Double Deflection Adjustable Aluminum Blade Grille For a 36" x 4" Duct Opening  (front blades parallel to shortest dimension)

Note: Sizes are Listed Nominal Duct Opening

NGD - Narrow ceiling grid dimples for 9/16" T-Rails

1" and 1 1/2"

Spiral Pipe Diffuser with Transition Box SD52-14X8G Residential Registers & Grilles 904 - Double Deflection AdjustableSD52 Transition Box Spiral Pipe Grille (Single Deflection) Standard Features Single deflection transition box mount spiral pipe grille Blades are parallel to the shortest dimension Allows for 2 way airflow adjustment Nylon bushings on adj. blades prevent metal on metal rattle Curved saddle with gasket provides airtight fit to spiral pipe Product sizes available to fit spiral pipe diameters 8 48." Spiral pipe diameter must be 4 larger than width of