Surface Mount Kit. Fits under 3000, 2110e, 160e and 140RC Series alarms to allows additional space for wiring connections. Fitted with 3 way connector block for ease of wiring- For use with the3000,2110e,160eand 140RC Series smoke and heat alarms- Fitted with a connector block for ease of wiring- 3 trunking knockouts for surface wiring- Includes a 3-way connector block for wiring mains and interconnect- Easy to install- Provides a clean and professional way to mount smoke alarms- Makes it easy to replace batteries or test alarms- Allows you to surface mount Aico 2100, 160RC and 140 series alarms