18" X 18" Plastic Access Panel Removeable/Reversable Door With Frame For Concealed Wall / Ceiling Application - [Outer Dimensions: 20" Width X 20" Height] Black + Product Details Size – LO246 Product Details Size 32 Compatible with Duct 4"

+ Product Details Size – 8" x 22" or 22" x 8" is the size for the duct opening measurement only

+ Product Details Size – 20"w X 22"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 27 5/8" width X 28 5/8" height

+ Product Details Size - 32"w X 18"h is the size for the duct opening measurement only

18" X 18" Plastic Access Panel Removeable Reversable Door With Frame For Concealed Wall Ceiling Application [Outer Dimensions: 20" Width X 20" Height] Black + Product Details Size – LO246 Product Details Size 32 Compatible with Duct 4" + Product Details Size – 8" x 22" or 22" x 8" is the size for the duct opening measurement only + Product Details Size – 20"w X 22"h is the size for the duct opening measurement only