Ceiling Grille - 3 Cone Step Down Diffuser - 12" x 12" - 8" Collar Compatible with Duct 8" This versatile guard features air

This versatile guard features air circulating ports on all four sides to allow proper airflow

+ Product Details Size - 30"w X 32"h is the size for the duct opening measurement only

+ Product Details Size - 18"w X 14"h is the size for the duct opening measurement only

+ Product Description Protect and secure your thermostat with this high-quality Clear Plastic Thermostat Guard

Ceiling Grille - 3 Cone Step Down Diffuser - 12" x 12" - 8" Collar Compatible with Duct 8" This versatile guard features air+ Product Details Size 12"w X 12"h. These are specially sized to fit into all drop ceilings, 24"x 24", also called T Bar systems. Can be hooked up with our "Butterfly Dampers" for precise airflow control. For 8" Round Duct Opening Spiral or Flex Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was just waxed Heavy Gauge Steel Heavier gauge than needed, built for durability and long life in mind, but still very thin