20" X 20" Steel Access Panel Removable Door For Concealed Wall / Ceiling Application With Slotted Lock - [Outer Dimensions: 21" Width X 21" Height] Compatible with Duct 8" Actual Filter Size – 29 LO246 Product Details Size 32 Compatible with Duct 4"

Actual Filter Size – 29 3/4"w x 9 3/4" x 1"

these grilles offer both functionality and aesthetic appeal

+ Product Details Size & Compatibility – The size of galvanized sheet metal straight floor boot is 14" X 4" X 7"

Design – 180 degrees double direction adjustable - fins are manually adjustable individually for optimal air distribution

20" X 20" Steel Access Panel Removable Door For Concealed Wall Ceiling Application With Slotted Lock [Outer Dimensions: 21" Width X 21" Height] Compatible with Duct 8" Actual Filter Size – 29 LO246 Product Details Size 32 Compatible with Duct 4" Actual Filter Size – 29 3 4"w x 9 3 4" x 1" these grilles offer both functionality and aesthetic appeal