Beige Metal Thermostat Guard with Solid Base - Tamper-Proof Cover, 6-1/4" x 4-3/4" w25h25 Actual Filter Size – 15

Actual Filter Size – 15 3/4"w x 31 3/4" x 1"

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+ Product Details Size – 20"w X 40"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 16" duct opening (measured at the opening)

Beige Metal Thermostat Guard with Solid Base - Tamper-Proof Cover, 6-1/4" x 4-3/4" w25h25 Actual Filter Size – 15+ Product Details Heavy Duty Steel Construction Made from 20 gauge steel for superior strength and durability. Tamper Proof Design Provides robust protection to prevent unauthorized access and ensure consistent thermostat settings. Secure Locking Mechanism Features a permanently attached eight tumbler lock with a supplied key for added security. Solid Base for Stability Built with a solid base for reliable mounting and stability. Universal Fit