SPARMAX Airbrush 0.4mm - Gravity with Pre Set HanSparmax SP. MAX4 Gravity Fed Dual Action Airbrush 0. 4mm The Sparmax SP. MAX4 is a precision engineered gravity fed, dual action airbrush designed for hobbyists, model makers, miniaturists, and artists seeking consistent, professional level results. With its versatile 0. 4? mm internal mix nozzle, this airbrush delivers everything from fine detailing to broad coverage, making it ideal for Gunpla, RC models, scale miniatures, and craft projects. Built