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Amazon.com : Kalolary 100 Pieces Drip Irrigation Fittings Kit Drip Irrigation Connectors for 16mm PE Tubing, Included 20 Tees, 20 Elbows, 20 Couplings, 20 End Cap Plugs, 20 Straight Barbs Drip Irrigation Parts : Patio, Lawn & Garden
Globe Scientific 116152R Polyethylene Flange Plug Cap for Test Tubes, 16mm Size, Red (Pack of 2000) - - Amazon.com
Globe Scientific 116152C Polyethylene Flange Plug Cap for Test Tubes, 16mm Size, Clear (Pack of 1000): Science Lab Cap Plugs: Amazon.com: Industrial & Scientific
Amazon.com : ZXCVB 1/2 3/4 1 Inch Thread to 16mm 20mm 25mm 32mm Hose Barb Connector 1/2 3/4 1" Pe Pipe Water Hose Connector 4pcs (Color : Yellow) : Patio, Lawn & Garden
Amazon.com: Kalolary 10PCS Barbed Tee 1/2 inch to 1/4 inch Irrigation Tube Anti-Drop Premiun Quality Fitting (fits 13mm ID/ 4mm ID), 16mm PE Pipe Lock Female Connector to 47 Pipe Variable Diameter