FD ( Fire Damper )

Height	100 or 150 or 200 or 250 or 300 or 350 or 400 or 450 or 500 or 550 or 600 or 650 or 700 or 750 or 800 or 850 or 900 or 950 or 1000
Width	100 or 150 or 200 or 250 or 300 or 350 or 400 or 450 or 500 or 550 or 600 or 650 or 700 or 750 or 800 or 850 or 900 or 950 or 1000
Type	MFD