Clear Plastic Elite Thermostat Cover - Solid Base - 3-7/8" x 3-1/2" white + Product Details Size -

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

+ Product Details Size - 22"w X 20"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 18 5/8" width X 38 5/8" height -

actual front end outer dimensions are 13

Actual Filter Size – 24 3/4"w x 9 3/4" x 1"

Clear Plastic Elite Thermostat Cover - Solid Base - 3-7/8" x 3-1/2" white + Product Details Size -+ Product Details Compact and Secure Design Measures 3 7 8" wide x 3 1 2" high x 3" deep, providing a perfect fit for most standard thermostats. Solid Base Construction Features a solid base for stable installation and reliable protection. Durable and Long Lasting Built with high impact clear plastic and premium materials for dependable performance. Tamper Proof Locking Mechanism Includes an eight tumbler lock with a supplied key to prevent