D4120W | OUTDOOR DUCT SMOKE DETECTOR 4-WIRE PHOTOELECTRIC LOW FLOW WATER TIGHT SYSTEM SENSOR SKU: D4120W Parent Item Parent Item - Additional Cost Has Item Option Details D4120W | OUTDOOR DUCT SMOKE DETECTOR 4-WIRE PHOTOELECTRIC LOW FLOW WATER TIGHT SYSTEM SENSOR DetailsBackDetailsD4120W | OUTDOOR DUCT SMOKE DETECTOR 4-WIRE PHOTOELECTRIC LOW FLOW WATER TIGHT SYSTEM SENSOR
