This isone45/45 headset bearing. Thisbearing willwork withmanybikesthat have integrated headtubes. It has an OD of 41.8mm, and ID of30.1mm and thickness is 7mm. This is one bearing, if you need a pair, buy 2!

Be sure to measure yourold bearingto assure that this will fit.The appearance of this part may vary slightlyfrom the photo.