Shimano Dura Ace HP-7410 Sealed Bearing Track Headset (JIS or ITA)

Shimano Dura Ace headset for 1 inch threaded forks available in standard JIS or ITA size.
A very easy-to-install headset, with sealed Dura Ace bearings.
JIS headsets are NJS stamped and approved for use in Keirin Pro track racing in Japan!
Stack height is 37.6mm including top and bottom head parts.