ENDURO ACB Mini 276442 BO Headset Bearing – 14.2mm x 25mm x 6.5mm: 45 x 45deg

This size bearing is also known in the bike industry by these part numbers:
• 307481
• W 276442

ACB 276442 BO | Stainless Steel 440C Angular Contact Black Oxide

Angular-contact headset bearing featuring anti-corrosion Black oxide/Magnetite treated 52100 High-Carbon Chromium alloy races paired with grade 10 Balls. Black Oxide treatment provides an extra level of corrosion resistance and extended worry-free performance

• Black Oxide-treated Chromium Steel for toughness and corrosion resistance.
• Stainless steel for even better rust resistance.
• Polished for a super smooth surface to reduce friction.
• Large balls spread the load, making the bearings last longer and work smoother.
• Special seals keep dirt and moisture out, keeping the bearings clean and protected.
• Filled with special grease to protect against water and sweat.
• Static load: 320lbf / 1.42kN
• Weight: 8g