Banner Engineering S4BA-ML-LPQ20 ຜ້າແສງຄວາມປອດໄພ S4B Safety Light Curtain, Accessory; Mute Arm Kit: L Configuration; Single Sided Left or Right; Includes: One Sensor Arm with Two Q20PLPQ5 Sensors Installed on the Arm; One Reflector Arm with Two Reflectors Installed on the Arm, and Mounting Hardware