Amazon.com: 4 Inch Diameter Clear PVC Schedule 40 Pipe [Pipe ID 4.0 inch, OD 4.5 inch] (Bluish tint), Choose Your Length (5 Inches to 8 feet) (Selected Length: 5 Inches) : Industrial & Scientific
Amazon.com: JEACENT Portable Air Conditioner Window Kit,Sliding AC Vent Kit, Adjustable PVC Seal Kit Panels Up to 60 Inches, for Universal Thread AC Exhaust Hose of 5.1" or 5.9" Diameter : Home