Venstar - ACC0620 - Lock Ring for Slimline Thermostats

Compatible with: T1700, T1800, T1900, T2700, T2800, T2900, T2900SCH Comes with 2 locking cover keys and is designed for easy slip-on/off installation The thermostat does not need to be removed or any wiring disconnected to install For use with Venstar Slimline Platinum thermostats