Ceramic bearings for cycle bike applications

RFQ Details

Hello there!, I, m an international trader who lives in the UK Edinburgh Scotland, I buy tune and sell perfomance mountain bikes and parts, i, m looking for a supplier of black silicon nitride Si3N4 ball bearing for applications in MTB mountain bike reconditioning and servicing, my company KaTec performs performance upgrades tuning and styling on top of the ramge frames, which cost between 1000 pounds and 3000 pounds new, i, m looking to introduce a new ceramic bearing upgrade line of bearings and would like to purchase a sample of 25 assorted bearings to test the quality before I make a larger order, the bearing must have balls made of silicon nitride prefferably Hot pressed silicon nitride or Sintered silicon nitrides, the bearing sizes are is millimeters
D Diameter W width B bolt hole (size 1 D28xW8xB12)
(size 2 D22xW8xB8) (size 3 D30xW9xB10) I would also preffer to pay via paypal in fact it is the only method of payment I will use, if you can supply me with these bearings a sample at first then greater quanities in the near future I look forward to hearing from you Kael Shawnasae, KaTec Performance Upgrades, Tuning and Styling.