The Factor OE replacement headset includes CeramicSpeed top and bottom bearings, a CNC'd and black anodized top cap with laser-etched Factor and CeramicSpeed logs and alloy split ring. This incredibly high quality headset is made for replacement of the Factor O2 and O2 Disc framesets, but fit any frame with the popular 36/45 IS standard, making this a perfect choice for an upgrade to any top performance frameset using this standard.