This air hose is made of strong polyurethane.
The coiled design allows it to recoil out of the way when not in use.
The 1/8 BSP end fits all Iwata airbrushes and the 1/4 BSP end fits compressors or can adapters that have the usual 1/4 BSP () fitting.
Much more convenient than the too-long hose supplied with the Sparmax compressors, but you'll need an adaptor to fit a Sparmax compressor - conveniently stocked by Neverboard.
You'll find it under Airbrush Hoses and it's a 1/4 male x 1/8 female bush adapter for the princely sum of €6.