a brand new System Sensor model B210LP 6” plug-in smoke detector bases. This base was new in the box. These are the Low Profile bases and trim rings. These bases fit the System Sensor B300-6, B300-6-IV and Fire Lite SD355 model smoke detectors. Each base (Part # B07-0126-201) also includes the trim ring (part #R35-0031-200). Each base also comes with installation instructions. These bases and trim rings were made in Mexico in 2022. The color of the base and trim ring is ivory. Please refer to the photos. I have a total of 22 bases and matching attached trims. If you need more than one, please make an offer for the greater amount. I have also listed 46 of the B300-6-IV bases that fit the same smoke detector modules but are not the low profile model, if you're not fussy, make an offer and buy 'em all! Shipping is extra. Thanks for stopping by to look!