28"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 35.75"h] Copper Coil Actual Filter Size – 9

Actual Filter Size – 9 3/4"w x 33 3/4" x 1"

Looks Like It Was Just Waxed

+ Product Spec Sheet Aluminum Return Filter Grille Spec Sheet

These Supply Diffusers with integral round necks are recommended for heating

28"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 35.75"h] Copper Coil Actual Filter Size – 9+ Product Details Size 28"w X 34"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 29. 75" Width X 35. 75" Height Weather and Pest Proof These louvers are especially designed to prevent water from entering your home, and with a built in back 1 2" mesh they also protect you from annoying rodents like mice, rats, birds, and squirrels High Quality Aluminum The premium durable aluminum will never rust and it will never