Full set of good quality UK manufactured headrace balls - both top and bottom race - to fit all Norton single frames - 34 balls in all (the correct amount for top and bottom races), plus one spare in case you drop one!, 34 + 1 = 35.
Note: we can also offer complete Headrace Bearing Sets for both - Norton Girder Fork models (Item 0912) and later telescopic fork (pre-Featherbed) models (Item 0913). These sets include both sets of headraces as well as the ball bearing sets shown here.
However, if your original headraces are not badly worn (and your balls are rusty or pitted) and you do not want the grief of having to completely remove headraces from frame and forks - then replacing your headrace balls with these and re-packing with new grease will probably improve your steering.