Round Stack Boot 10" X 3.25" X 6"- is Compatible with Duct 6" Sheet Metal / Round Duct Actual Filter Size – 7

Actual Filter Size – 7 3/4"w x 7 3/4" x 1"

+ Product Details Size – 12"w X 20"h pleated MERV 8 filter for HVAC return filter grille - 3 Pack

+ Product Details Size – 18"w X 12"h is the size for the duct opening measurement only

Filter Size - 25

+ Product Details Size – 36"w X 28"h is the size for the duct opening measurement only

Round Stack Boot 10" X 3.25" X 6"- is Compatible with Duct 6" Sheet Metal / Round Duct Actual Filter Size – 7+ Product Details Size The size of a galvanized sheet metal stack boot is 10" X 3. 25" X 6". It is compatible with duct 6". Design The stack boot at the bottom of the stack allows a transition from an ordinary large round or rectangular duct to a thin wall mounted duct. Applications The straight boot is used for a straight line transition going from round pipe or insulated flex duct to wall stack. Premium Quality Our straight round stack boot is made