10 In. X 3-1/4 In. to 5 In. Stack Boot

Made in USA 6" Round ID x 4" x 10" Galvanized Duct End Register Boot

Made in USA Galvanized HVAC Register 90? Boot Duct, 2-1/4" x 10", 5" Diameter

Grey Metal-10X4X5 in. Straight Boot

6" ID Galvanized Duct End Stack Boot 3-1/4" Long x 10" Wide, Standard Gage

Made in USA Galvanized Straight Register Boot Duct, 4" x 10" Rectangle, 6" Diam

Stack Boot Rectangular Duct Galvanized Steel Durable 10 In. X 3-1/4 In. to 5 In.