An airbrush is only a true Iwata when it contains genuine Iwata parts. Our parts are precision crafted on the industrys most sophisticated machinery using the finest materials for consistent quality and performance. Every batch, every time. Iwata Eclipse nozzles are made from silver alloy that comes attached to a compression-fit brass base. This specialized nozzle is a combination of the high-flow shape of the Eclipse BCS nozzle and the more traditional nozzles of the finer detail airbrushes, lending to its versatility and range. Because Iwata Eclipse (CS, BS, SBS) nozzles are compression-fit there is no threading required nor recommended. When it is time to replace the nozzle, simply remove the entire piece (nozzle and base) and drop-in a new one. This easy disassemble and reassemble contributes to Eclipses ease, popularity and versatility.