Fits all Honeywell and most other thermostats</br>Clear plastic cover that resists yellowing</br>Key lock with inner shelf to prevent tampering</br>Protects unwanted changes to AC/Heating preferred settings</br>Ultra clear acrylic resin cover and base resists the yellowing effects of chemicals and UV-light</br></br>Product Description</br></br>The product is easy to use. The product is highly durable and handle. The product is manufactured in United States.</br><br/>http://www.amazon.com/gp/product/B0002YSV78