Black Oxide +

Enhanced Corrosion Resistance: Black oxide provides a protective layer that helps prevent rust and oxidation
Reduced Wear: The coating reduces friction between the metal surface
Improved Durability: By forming a stable layer on the surface of the metal
Reduced Service Time Less likely to fuse to the frame and headset housing
Stainless ++

High Chromium Content (16-18%): Highly resistant to rust, corrosion, and oxidation.
Corrosion Resistance in Wet Conditions: 440C stainless steel performs particularly well in poor, wet, or marine conditions,
High Hardness: After heat treatment, 440C can reach a high level of hardness
Reduced Service Time Less likely to fuse to the frame and headset housing