Your clients don’t have to continuously buy new bearings.  Ceramic is more durable. The balls itself can not rust. Ceramic is less prone to expand due to heat, so the balls put less pressure on the steel raceways of the bearing. Less maintenance needed compared to steel balls. Normally, you need to clean your bearings often. Steel corrodes over time, but ceramic will not corrode. This reduces the possibility of breaking down. Ceramic is harder than steel, the balls seem to sort off clean the bearing from the inside, by simply riding the bearings. It breaks down any sand that comes into the bearings. Another advantage is the thicker cage/retainer than standard cage.
 

Item	Swiss Hybrid Ceramic Balls Bearings
Model	608 or 627
Material	chrome steel rings, ceramic balls
Size	8*22*7mm
Lubrication	speed oil
Cage/ Retainer	Nylon cage
Seal/Shield	rubber single shield
Package	tube of 8 or 16 pcs, can be customized
MOQ	1600 pcs of 200 sets