Clear Plastic Regal Thermostat Cover - Ring & Solid Bases - 6-3/8" x 3-1/2" Aluminum - Cube Core + Product Details Size –

+ Product Details Size – 32"w X 34"h is the size for the duct opening measurement only

+ Product Details Size – 20"w X 20"h is the size for the duct opening measurement only

+ Product Details Size - 18"w X 6"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 20" or 20" x 12" duct opening (measured at the opening)

Actual Filter Size – 27 3/4"w x 29 3/4" x 1"

Clear Plastic Regal Thermostat Cover - Ring & Solid Bases - 6-3/8" x 3-1/2" Aluminum - Cube Core + 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