The attached Iwata airbrush fitting and 1/4 in compressor fitting use O-rings which form leak-proof seals when attached.
Plews LubriMatic 12" Grease Hose with Coupler 10-202
Plews LubriMatic 12" Grease Hose with Coupler 10-202 F-2
6/8/10AN Black Nylon Braided PTFE Fuel Line 10/20ft 6PCS Fittings Hose Kit E85
IWATA for BC/BC2 /ECL Airbrush Aux Lever I 040 5