F5-11M, F8-16M or 51100 Thrust Ball Bearing Inside Diameter: 5mm, 8mm or 10mm Outside Diameter:11mm, 16mm, 24mm Height:4.5mm, 5mm or 9mm Material:Chrome Steel New arrival: 51106, inner 30mm Bearing steel frame and ball bearings Retainer of F5, F6, F8, F10 and F12 is brass. The retainer of 51100 and ...