I will give you the best solution. Orange Hobby. AMK Models.
Harder and Steenbeck Air Hose 1/8 with quick coupling and air valve 123983 : Arts, Crafts & Sewing
YOUR AIRBRUSH SET should give you SMOOTH, PRECISE, CONTROLLED APPLICATION – unfortunately, many airbrush sets are inconsistent and blotchy. The Harder
Harder & Steenbeck Airbrush Kit - Evolution Silverline Two in One I German-Engineered Dual Action Airbrush Painting Set with Gravity Feed I 0.2mm +
Harder and Steenbeck parts for for Evolution Silverline
HARDER*STEENBECK 104063 Airbrushes Joint
Harder & Steenbeck Micro Cup
Harder & Steenbeck Micro Cup
Handle Extension for Harder & Steenbeck airbrushes - Everything Airbrush
Valve stem with O-ring Harder & Steenbeck 123261 buy sell online store
Harder & Steenbeck Airbrush Replacement Parts – Maple Airbrush Supplies
Harder Steenbeck Airbrush Parts — Midwest Airbrush Supply Co
Harder & Steenbeck Airbrush Quick Release Body - 1/8 BSP - Everything Airbrush
Accessories - Harder & Steenbeck Airbrush
Airbrush Hoses
Just like the Single-brush version, these dual airbrush holders are sturdy, heavy, stable and well, really freak'n cool :)
Harder & Steenbeck Dual Airbrush Holder/Air Manifold | Model Paint Solutions
Handle Extension for Harder & Steenbeck airbrushes - Everything Airbrush