Parallel Volume Damper Low Leak 3000PLL-40X36 Step Down Ceiling Diffuser 904 - Double Deflection Adjustable

904 - Double Deflection Adjustable Aluminum Blade Grille For a 36" x 30" Duct Opening (front blades parallel to shortest dimension)

w/ Lever Operated Opposed Blade Damper

Spiral Diffuser Radius Flush Mount Diffuser Single Deflec

T-Bar Fixed Core Step Down Diffuser

Stainless steel

Parallel Volume Damper Low Leak 3000PLL-40X36 Step Down Ceiling Diffuser 904 - Double Deflection Adjustableh3. Standard Features * 16 gauge galvanized channel frame * Parallel blades are cee stiffened 16 gauge galvanized for strength and stability * Blades pivot on non metallic celcon bushings * 1 2" square zinc plated steel pivot pins * 1 2" square zinc plated steel adjustable operating shaft extending up to 4" beyond the air control frame * Single blades on dampers with a height of 12" or less * Mill finish h3. Options * 3000 PLL Low Leak Air Control