Master Airbrush Brand 1/8" BSP Male to 1/8" BSP Male Fitting Conversion Adapter Nipple, Connector for Airbrush Hoses, Compressors, Pipe Master Airbrush Brand Airbrush Fitting Conversion Adapter for compressors, airbrushes, hoses, hose splitters and manifolds Airbrush Fitting Connector Adapter Nipple: 1/8" BSP Male to 1/8" BSP Male Screw the adapters 1/8" BSP male thread size into a 1/8" BSP female fitting to convert it to a 1/8" BSP male size thread that is most common for compressors, airbrushes and hoses Commonly used to connect two 1/8" BSP airbrush air hoses together 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