Beige Metal Thermostat Guard with Ring Base - Durable Tamper-Proof Cover, 6" x 3-13/16" return grille + Product Details Size -

+ Product Details Size - 24"w X 36"h is the size for the duct opening measurement only

+ Product Details Size - 24"w X 14"h is the size for the duct opening measurement only

Optional Butterfly Damper Available At Asin: B007CNEL1W

and sound level range of NC 25 to 35

our damper helps create a well-balanced indoor environment

Beige Metal Thermostat Guard with Ring Base - Durable Tamper-Proof Cover, 6" x 3-13/16" return grille + Product Details Size -+ Product Details Heavy Duty Steel Construction Made from 20 gauge steel for superior durability and reliable performance. Ring Base Design Allows for easy installation without removing the thermostat, providing maximum flexibility. Tamper Proof Security Features a robust design to prevent unauthorized access and protect your thermostat settings. Built In Locking System Comes with a permanently attached eight tumbler lock and a supplied key for added