BRACKET E-2B is part of the BRACKET E ceiling-and-wall mount distance holder.
The insert allows installation of the OPAL
(GY), OPAL Plus (GY), OPAL Pro (GY) and AOD-210
(GY) detectors, mounted on the BRACKET E-5 ball-joint holder.
The BRACKET E-2B insert is mounted on the BRACKET
E-1 (GY) body.