You will probably need a 510-to-510 adapter (actually it's an extension rather than adapter). They come in sealed and unsealed varieties, and in different lengths. Mine is only about 1/4". The ones on the GoodProphets website come in 1/2" and 7/8" lengths. I have no idea about sealed vs. unsealed except that I seem to remember reading that the sealed version helps fix what some people consider to be an airy draw on the SS and chrome VTubes.
When I bought my SS Vtube, I thought I would not need an adapter but that is not the case. I've been scratching my head about this, and just read another post somewhere else on ECF that confirms that the extension is required. I don't know much about it, but thought I would give you a heads up so that you could do some research and avoid the frustration of unboxing your clearos and not being able to get them to screw onto your VTube.