This is a set of brand new Adaptors for connecting all types of airbrushes and compressors to your air hoses.
A1: M5-0.5 female to 1/8" BSP male, A2: 1/8" BSP male to 1/8" BSP male
A3: 1/8" BSP male to 1/4" BSP male, A4: 1/8" BSP male to 1/4" BSP female
A5: 1/8" BSP female to 1/4" BSP male
A6: 1/4" BSP female to 1/4" BSP male, A7: 1/4" BSP female to M5x0.5 male