The Air Purifier Replacement Bulb by sosanlon is specifically designed for the RGF REME Halo PHIC-RH 9" unit, providing clean and fresh air for your home. Made in the United States, this replacement cell is a single unit that is easy to install and maintain. With dimensions of 1.57 x 1.57 x 9 inches, this bulb is the perfect fit for your air purifier system, ensuring efficient filtration and purification of the air in your living space.