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. FEATURES: Fits SRAM XD 11/12-speed cassette types Crafted from lightweight aluminum End Cap Sold Separately SPECS: Material: Aluminum Cassette Body Type: SRAM XD 11/12 Speed Weight: 39 g