Ratchet freehub bodies have a gloss finish and don't have a seal, as this is fixed on the hub shell. The Ratchet System was the first of this type for DT Swiss; used in the mid-range products like the 350 hubs.
Easy to install and far superior to aluminum free hub body.
Easy to swap out without special tools. The special grease for star ratchets helps quiet the hub when it free wheels. The cassette does not deform the steel free hub body in the way it does the aluminum free hub body eliminating any creaking from the engagement of cassette and free hub. A little heavier than aluminum free hub body but I don't care because the creaking is non existent - yeah!!! Great product.