CO MR 18307 LLB - Enduro Zero, Black-Oxide, Ceramic Hybrid, ABEC-5, Radial Bearing (CN Clearance) - 18mm x 30mm x 7mm sale There are quite a few

There are quite a few different materials used for ceramic balls and races in the Industry

Professional quality

Precision machined Black Delrin Derailleur pulleys featuring Zero

Angular Contact Bearing Bottom Bracket for T47 Framesets and Shimano 24mm Cranksets

000 tolerance of sphericity and is considered extremely round

CO MR 18307 LLB - Enduro Zero, Black-Oxide, Ceramic Hybrid, ABEC-5, Radial Bearing (CN Clearance) - 18mm x 30mm x 7mm sale There are quite a fewCO MR 18307LB Enduro Zero, Black Oxide, Ceramic Hybrid, ABEC 5, radial Bearing (CN clearance) 18mm x 30mm x 7mm Enduro Zero, Ceramic Hybrid, ABEC 5, radial bearing featuring black oxide treated 52100 high Carbon Chromium alloy races paired with Grade 5 Silicon Nitride Ceramic balls, with dual lip labyrinth (LLB) seals to withstand the outside elements and to contain the 90% fill Mobilux NGLI 2 high pressure water proof synthetic grease. Si3N4 ceramic