Amazon.com: Horiznext NPT 1" male thread to 1 inch O.D. barb stainless steel pipe fitting, for connecting 1 inch I.D. air hose tubing, pack of 2 pcs : Industrial & Scientific
Pneumatic Fitting Hose Connector Tube Plastic Joint Compressor Push-in Quick Release Pipe For 4mm 6mm 8mm 10mm 12mm Pu Py - Pneumatic Parts - AliExpress
Amazon.com : 10 Pack ABS Garden Hose Tap Connector Kit for Join Garden Hose Pipe Tube(2 Double Male Connector,6 Hose 1/2" End Quick Connect,2 Hose Tap Connector 1/2 Inch(21mm) and 3/4 Inch (
Pc Pneumatic Quick Connector Copper Wire Air Pipe Hose Connector Full Copper Thread Straight Snap Type Quick Inlet, Pneumatic Accessories Assembly - Temu