Copic - Airbrush Air Hose - 1/8 to 1/8 - For use with the Copic Airbrush System. This hose is for going from an air compressor to the air adapter. It is a replacement for the one included with the Complete Air Compressor. This hose works with Iwata or Sparmax mini compressors. Sizing is based on the Iwata 1/8th in. standard size threading.