Honeywell 50033847-001 Suite PRO Vertical Thermostat Wall Plate Adaptor For TB6575 & TB8575 Series Thermostats May Be Mounted on 4" x 4" Junction Box or 2" x 4" Stud Includes 2 Junction Box Mounting Screws and 2 Screws for Mounting Stat Sub-Base to Adaptor Plate