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Plastic 4" inch 90 degree duct connector. Easy to mount 90 elbow for flex or straight pipe. - Amazon.com
NIBCO 4 in. PVC 22-1/2-Degree Hub x Hub Elbow C4808HD4 - The Home Depot
Plastic 4" inch 90 degree duct connector. Easy to mount 90 elbow for flex or straight pipe. - Amazon.com
Amazon.com : Sealproof Flexible PVC Pipe 1-1/2 Inch Dia Hose 50 FT Length, Black Tubing, Schedule 40, Premium Quality Made in USA : Tools & Home Improvement
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The Plumber's Choice 1-1/2 in. 90-Degree Pvc Flexible Elbow Coupling with Stainless Steel Clamps E2584112 - The Home Depot
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uxcell White 50mm x 50mm 90 Degree Equal Elbow PVC Pipe Coupling Connector - Amazon.com
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Flexible Sink Drain Pipe Expandable Grey Sink Drain Pipe Sink with 2*Gaskets Set | eBay
Flexible PVC Non Metallic UL Liquid Tight Electrical Conduit (2" dia x 25 ft) - - Amazon.com