Beige Metal Thermostat Guard with Solid Base - Tamper-Proof Cover, 6-1/4" x 4-3/4" Black This grill comes in four

This grill comes in four different designs

Actual Filter Size – 24 3/4"w x 35 3/4" x 1"

Actual Filter Size – 25 3/4"w x 33 3/4" x 1"

+ Product Details Size - 16"w X 18"h is the size for the duct opening measurement only

Beige Metal Thermostat Guard with Solid Base - Tamper-Proof Cover, 6-1/4" x 4-3/4" Black This grill comes in four+ 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