Parker Legris 0105 16 21-pk5 Legris 0105 16 21 Brass Compression Tube Fitting, Connector, 16 mm Tube OD x 1/2" BSPT Male Brass (Pack of 5): Amazon.com: Industrial & Scientific
Parker Legris 7818 04 13-pk10 Legris 7818 04 13 Pneumatic Threshold Sensor, 45-115 Psi, 1/4" BSPP Male, 4 mm Tube Pilot/Signal Port (Pack of 10): Amazon.com: Industrial & Scientific
Legris 3109 04 20 Nylon & Nickel-Plated Brass Push-to-Connect Fitting, 90 Degree Elbow, 5/32" or 4 mm Tube OD x #10-32 UNF Male: Garden Hose Parts: Amazon.com: Industrial & Scientific
Legris 7665 06 13 Nylon Air Flow Control Valve, 90 Degree Elbow, Meter-Out, External Screw/Knob, 6 mm Tube OD x 1/4 BSPT Male: Industrial Control Valves: Amazon.com: Industrial & Scientific
Legris 7913 04 00 Composite Mini Ball Valve, 3-Way, 4 mm Tube OD: Industrial Ball Valves: Amazon.com: Industrial & Scientific