NORCO Revolver 2020 supsension bearing kit. For Revolver frames manufactured in 2020 and 2021. Contains 12 pcs Enduro MAX (full complement) sealed cartridge bearings. 10 pcs of the 12 have black oxide anti-corrosion race treatment. NOTE: If black oxide bearings are not available, Enduro MAX bearings without the black oxide finish may be substituted.