20 1/4" neck bearings. I you need 40 you must enter "2" in the quantity box.This kit is perfect if you are already taking your front end off and you lose a few bearings. If you have a Triumph 650 from 55-70 or a 500 from 67-72 this kit will work for you. The bearings are meant to fit a 1 1/16" stem but will work with any application requiring 1/4" ball bearings.