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Amazon.com: FULAIERGD 1/2 inch Tubing (1/2" ID x0.6-0.63" OD) 16mm to 1/4 inch Irrigation Tube Anti-Drop Barbed Hose Fittings (Fits 13mm ID / 4mm ID) (1/2 TO 1/4 inch Fittings Kit) :
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Caplugs - Medical Tubing Connectors & Fittings; Connector Type: Y; Number of Inlets: 2; Material: Polypropylene; Inlet A Inside Diameter (Inch): 1/2; Inlet B Inside Diameter (Inch): 1/2; Inlet C Inside Diameter (
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Amazon.com : 19 Pcs Pond Irrigation 1/2 inch Vinyl Tubing Fittings Kit, For (1/2" ID x0.6-0.63" OD) 16mm Drip Tubing - 6 Tees, 6 Couplings, 4 Ends, 2 Elbows, 1 Switch Valves-
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