Hi-Control of Hi-Precision work featuring the ultimate in air control directly at the nozzle with Iwata?s new Micro Air Control (MAC) Valve Technology, the Hi-Line Series doesn?t just change air pressure instantly it changes the way you airbrush. Designed for artists who need extreme control of detailed spraying, this series uses larger diameter threads on the nozzle than the High Performance Series. This makes the nozzle much stronger when tightening it onto the airbrush and ensures better centering of the nozzle when it screws onto the airbrush body. The Hi-Line Series is now made with solvent proof PTFE needle packing, dual-purpose cutaway, pre-set handle and one-pieces auxiliary lever/needle chucking guide.