The Plumber's Choice 1/2 in. x 1/2 in. Plastic PEX Poly Alloy 90-Degree Swivel Elbow PEX x FPT Barb Pipe Fitting (5-Pack) 1212PPSL-5 - The Home Depot
4 mm Brass/Plastic Elbow Hose Connector [2 Pieces] | Tameson.com
Amazon.com: 20PCS Aquarium Airline Connectors 90° L Elbow Plastic Air Pump Tube Connectors Adapter Fish Tank Hose Fittings Connector Joint : Pet Supplies
1-1/8 Inch Plastic 90 Degree Elbow Hose Fitting for Boats - White's Marine
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Amazon.com: JoyTube Plastic 1/4” Hose ID 90 Degree Elbow Barb Fitting, 6 Pcs Equal Barbed Joint Splicer Mender Adapter Union Adapter for Boat Aquarium : Industrial & Scientific