Master Airbrush Brand Airbrush Fitting Conversion Adapter for Badger Master Airbrush Brand Airbrush Fitting Conversion Adapter for Badger Airbrushes Converts a Badger airbrushes male M5 0.5 mm thread size to standard 1/8" BSP male thread size for easy connection to 1/8" BSP air hoses Adapter has 1/8" BSP male threads on the outside and Badger size female threads on the inside The adapters 1/8" BSP hose thread size is the most common hose fitting size used for many popular airbrush brands like Master and Iwata