An airbrush is only a true Iwata when it contains genuine Iwata parts. To keep your airbrush operating at peak performance, make sure the model number on the side of your airbrush is listed below. FOR USE WITH:. G-Series:HP-G6. Iwata 1/4″ (F)female to 1/8″ (M)male adaptor for use with air hoses, regulators and multiple valve assemblies. This adaptor can be used to connect a spray gun with a 1/4″ fitting to an Iwata air hose with a 1/8″ fitting.Our parts are precision crafted on the industrys most sophisticated machinery using the finest materials for consistent quality and performance. Every batch, every time.