Save watts and ride faster with guaranteed lowest friction, optimized power transfer, and longest product lifetime- External ITA, Italian threaded bottom brackets featuring anodized aluminum cups- Coated: metallic layer that covers bearing races making them 75% harder than steel. Even lower friction and highly resistant to corrosion- Standard: low drag with hardened steel races and ceramic ball bearings- Offered in 24mm for Shimano, FSA, Race Face, etc, and 28.99mm for SRAM DUB- In the box: 2 threaded cups, 2 dust covers, spacer tube, 10mm syringe of All Round Grease, and sticker sheet