4mm Quick Fitting, 5/32” OD Push to Connect Pipe Tube Straight Fittings, Pneumatic Air Line Connector 20Pcs: Amazon.com: Industrial & Scientific
Amazon.com: Eoiips 1/4" ID x 3/8" OD Silicone Tubing, Food Grade High Temp Tube Hose for Home Brewing, Beer Line, Kegerator, Wine Making Air Line by Proper Pour (16.4Ft) : Home &
Qitdathn Rain Barrel Spigot Kit PVC Bulkhead Fitting with Ball Valve and Thread Seal Tape and Garden Hose Male Threaded Adapter(1" Male) for 1" Female Threaded Connector(kit for 1inch Female)