Clear Plastic Classic Thermostat Cover- Solid and Ring Bases- 5-1/4"-4-3/8" Compatible With Duct 8in The first number in a

The first number in a grille size represents the width

this easy-to-install grille fits seamlessly into any standard return filter opening

actual front end outer dimensions are approximately 16 5/8" width X 26 5/8" height -

+ Product Details High Quality - Aluminum housing on the outside and on the inside for the best insulation value

Designed for both wall and ceiling applications

Clear Plastic Classic Thermostat Cover- Solid and Ring Bases- 5-1/4"-4-3/8" Compatible With Duct 8in The first number in a+ Product Details Durable Construction Made with clear, high impact plastic to provide reliable and long lasting protection for your thermostat. Two Mounting Base Options Includes both a solid base and a ring base. The ring base allows installation without removing the thermostat, offering maximum flexibility. Locking Security System Features a built in eight tumbler lock and a supplied key to prevent tampering and maintain consistent temperature