bicycle headset bearing

Item:KO-BB005 Type: Double Sealed 2RS Size: 30.15 mm x 41 mm x 6.5 mm Inner Diameter (ID): 30.15 mm Outer Diameter (OD): 41 mm Width / Height / Bridth (W / H / B): 6.5 mm Bearing Chamfer: Inner Ring 45° / Outer Ring 45° Radial Play / Clearance: C0 Rings / Races Material: Chrome Steel 100Cr6 / Stainless Steel SUS 440C Balls Material: Chrome Steel 100Cr6 / Stainless Steel SUS 440C / Ceramic Si3N4 Cage Material: Nylon PA66 / Stainless Steel SUS 304 Seal Materil: NBR+SPCC Seal Type: Non-contacted / Light Contacted / Heavy Contacted Seal Color: Black / Red / Blue / Green / Yellow / Gray Lubrication / Grease: SHELL / MOBIL / KYODO / KLUBER / EXXON / HTHS Bearing Brand: Neutral / OEM