Muting accessories, muting arm kit M4000, 2 sensors, parallel muting, Description: Parallel muting (2 sensors), muting sensor brackets for mounting on M4000 housing profile or device column with external mounting grooves, Scope of delivery: 2 x round steel arm, 4 x universal holder, 2 x WL280-2P1131 including cable and plug, 2 x reflector P250