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Amazon.com: 4 inch to 2-1/2 inch Reducer with 4 inch Flexible Cuff Rubber Coupler Fitting and Stainless Steel Hose Clamps with Turn Key Thumb Screw to Easily Tighten and Loosen • Designed
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Amazon.com: Flexible PVC Rubber Coupling with Stainless Steel Clamps 4 x 2 Inch, Black : Industrial & Scientific
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