Clear Plastic Classic Thermostat Cover- Solid and Ring Bases- 5-1/4"-4-3/8" Grilles + Product Details Size -

+ Product Details Size - 4"w X 12"h is the size for the duct opening measurement only

Say goodbye to pest-related worries as the built-in back 1/2" mesh acts as a barrier against unwanted rodents like mice

+ Product Details Size – 8"w X 30"h is the size for the duct opening measurement only

Design – Removable door/face for easy filter change & cleaning - uses a 1" thick filter

Actual Filter Size – 27 3/4"w x 19 3/4" x 1"

Clear Plastic Classic Thermostat Cover- Solid and Ring Bases- 5-1/4"-4-3/8" Grilles + Product Details Size -+ 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