Amazon.com: CEKER Push to Connect Air Pipe Fittings PC 3/8" Tube Od x 1/8" NPT Thread Male Straight Pneumatic Fitting Push in Quick Tube Fitting Connector 5Pack : Industrial & Scientific
Amazon.com: Utah Pneumatic Push-To-Connect Fittings 5/16 Or 8MM"Od 1/4 Npt Air Elbow Union Air Line Tube Fittings Push In Fitting Pneumatic Push Elbow(10 Pack) : Industrial & Scientific
Push to Connect Tube Fitting Adapter 10mm OD x 1/4" PT Female Silver Tone - Silver Tone,Black - Bed Bath & Beyond - 26635093
Push to Connect Tube Fitting,Adapter,8mm Tube OD x G1/4" Female Straight Pneumatic Connecter Pipe Fitting 4pcs - Walmart.com
Push to Connect Tube Fitting Male Elbow,4mm Tube OD x 3/8 NPT Thread Pneumatic Air Push Fit Lock Fitting 2pcs - Walmart.com
Push to Connect Tube Fitting Adapter 10mm OD x 1/4" PT Female Silver Tone - Silver Tone,Black - Bed Bath & Beyond - 26635093