Alarm Controls System Accessories – SMB Mounting Boxes for Vandal Resistant Push PlatesThe SMB is a single gang or narrow stile surface mounting box. It can be used with Alarm Controls Request to Exit devices.SMB-01 – Surface Mount Box with Two N/O Tamper SwitchesSMB-01A -Surface Mount Box with Two N/C Tamper SwitchesSMB-3 – Narrow Surface Mount Box for 1-3/4 Wide Wall Plates, US 28 Clear Anodized FinishSMB-3D – Narrow Surface Mount Box for 1-3/4 Wide Wall Plates, US40 Duranodic Finish