PC Pneumatic Fitting Push Fit Hose Tube Connector Fittings Male Thread 1/8 1/4 3/8 1/2 Air Quick 4mm 6mm M5 8mm 10mm M6
https://www.vogueparade.com/shopping/EN/42/1/1005003747171202/pc-pneumatic-fitting-push-fit-hose-tube-connector-fittings-male-thread-18-14-38-12-air-quick-4mm-6mm-m5-8mm-10mm-m6//